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Welcome Aboard IHC185™ Internet Horology Club 185 IHC185™ Discussion Site Main Page Horological Discussions, Questions and Answers Military Timepiece Discussions - EXCLUSIVE! Evolution Of 4992B and 3992B Markings, Numbers and Database
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Please continue adding to this list through posting! 3992B NAVIGATION MASTER WATCH MFR’S PART NO.3992B BROAD ARROW SERIAL NO. 463-1942 HAMILTON WATCH CO. A.M. 6B/60 MOVEMENT NO. 3C274 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 3992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. NAVY BU. SHIPS, BROAD ARROW CASE, KEYSTONE BASE METAL 1352967 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS AND BROAD ARROW THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, BLACK HOUR MINUTE AND SWEEP SECOND HANDS WOODEN CASE WITH GLASS WINDOW NAVIGATION MASTER WATCH MFR’S PART NO.3992B 0552-521-0243 BROAD ARROW SERIAL NO. 902-1942 HAMILTON WATCH CO. H.S.3 LINED OUT MOVEMENT NO. 3C505 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 3992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. NAVY BU. SHIPS, BROAD ARROW CASE, KEYSTONE BASE METAL 1352574 DIAL, NATO THE OUTER SECOND ORBIT IS GRADUATED IN 100 EVEN DIVISIONS NUMBERED AT EACH 10TH DIVISION, BLACK IN COLOR THE INTERMEDIATE MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, RED IN COLOR THE CENTER HOUR ORBIT IS GRADUATED IN 12 EVEN DIVISIONS NUMBERED AT EACH DIVISION, BLUE HOUR/ RED MINUTE AND BLUE SWEEP SECOND HANDS WOODEN CASE WITH GLASS WINDOW ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- A.M. 6B/60 NAVIGATION MASTER WATCH MFR’S PART NO.3992B BROAD ARROW SERIAL NO. 1061-1942 HAMILTON WATCH CO. H.S.3 MOVEMENT NO. 3C1004 STANDARD HAMILTON WATCH CO. U.S.A. 3992B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 004710 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS AND BROAD ARROW THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, BLACK HOUR MINUTE AND SECOND HANDS NAVIGATION MASTER WATCH MFR'S PART NO.3992B SERIAL NO.1646-1942 HAMILTON WATCH CO. H.S.3 MOVEMENT NO. 3C1460 STANDARD HAMILTON WATCH CO. U.S.A. 3992B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 571XXX DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS AND BROAD ARROW THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, BLACK HOUR MINUTE AND SECOND HANDS NAVIGATION MASTER WATCH MFR’S PART NO.3992B 0552-521-0243 BROAD ARROW SERIAL NO. 1476-1942 HAMILTON WATCH CO. H.S.3 LINED OUT MOVEMENT NO. 3C1583 STANDARD HAMILTON WATCH CO. U.S.A. 3992B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 571023 DIAL, NATO DIAL, NATO THE OUTER SECOND ORBIT IS GRADUATED IN 100 EVEN DIVISIONS NUMBERED AT EACH 10TH DIVISION, BLACK IN COLOR THE INTERMEDIATE MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, RED IN COLOR THE CENTER HOUR ORBIT IS GRADUATED IN 12 EVEN DIVISIONS NUMBERED AT EACH DIVISION, BLACK HOUR RED MINUTE AND BLUE SWEEP SECOND HAND M.T.C.A NAVIGATION MASTER WATCH MFR’S PART NO.3992B BROAD ARROW SERIAL NO. 1014-1942 HAMILTON WATCH CO. A.M. 6B/60 MOVEMENT NO. 3C1694 STANDARD HAMILTON WATCH CO. U.S.A. 3992B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 570772 DIAL, 12- 24 HOUR HAMILTON WHITE FACE BLACK NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, BLUE HOUR MINUTE AND SECOND HANDS MASTER WATCH MFR’S PART NO.3992B 0552/520-8049 BROAD ARROW SERIAL NO. 1790-1942 HAMILTON WATCH CO. H.S.3 LINED OUT MOVEMENT NO. 3C1817 STANDARD HAMILTON WATCH CO. U.S.A. 3992B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 570615 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS AND BROAD ARROW THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, BLACK HOUR MINUTE AND SECOND HANDS NAVIGATION MASTER WATCH MFR'S PART NO. 3992B 0552 - 521 - 0243 engraved across the MFR'S No. Broad Arrow SERIAL NO. 1488-1942 HAMILTON WATCH CO. H.S. 3 struck through two times MOVEMENT NO. 3C1860 STANDARD HAMILTON WATCH CO. U.S.A. 3992B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 570xxx DIAL, NATO DIAL, NATO THE OUTER SECOND ORBIT IS GRADUATED IN 100 EVEN DIVISIONS NUMBERED AT EACH 10TH DIVISION, BLACK IN COLOR THE INTERMEDIATE MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, RED IN COLOR THE CENTER HOUR ORBIT IS GRADUATED IN 12 EVEN DIVISIONS NUMBERED AT EACH DIVISION, BLACK HOUR RED MINUTE AND BLUE SWEEP SECOND HAND NAVIGATION MASTER WATCH MFR’S PART NO.3992B 0552/520-8049 BROAD ARROW SERIAL NO. 1914-1942 HAMILTON WATCH CO. H.S.3 LINED OUT MOVEMENT NO. 3C2062 STANDARD HAMILTON WATCH CO. U.S.A. 3992B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 570672 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS AND BROAD ARROW THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, BLACK HOUR MINUTE AND SECOND HANDS NAVIGATION MASTER WATCH MFR’S PART NO.3992B 0552/520-8049 BROAD ARROW SERIAL NO. 1901-1942 HAMILTON WATCH CO. H.S.3 LINED OUT MOVEMENT NO. 3C2096 STANDARD HAMILTON WATCH CO. U.S.A. 3992B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 570653 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS AND BROAD ARROW THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, BLACK HOUR MINUTE AND SECOND HANDS NAVIGATION MASTER WATCH MFR’S PART NO.3992B 0552/520-8049 BROAD ARROW SERIAL NO. 1903-1942 HAMILTON WATCH CO. H.S.3 LINED OUT MOVEMENT NO. 3C2198 STANDARD HAMILTON WATCH CO. U.S.A. 3992B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 570668 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS AND BROAD ARROW THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH 5TH DIVISION, BLACK HOUR MINUTE AND SECOND HANDS --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 4992B PART NO. AN 5740 Mfr's Part: No. 4992B Serial No. 289-41 Contract No:86366 Hamilton Watch Co. MOVEMENT NO. 4C122 HAMILTON WATCH CO. U.S.A. UNDER CENTER SECONDS WHEEL, ADJ TEMP. AND 6 POS. UNDER CENTER SECONDS BRIDGE. 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS ALL BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS BU. AERO. U.S. NAVY ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 1300xxx DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS PART NO. AN 5740 Mfr's Part: No. 4992B Serial No. 454-41 Contract No:86366 Hamilton Watch Co. MOVEMENT NO. 4C319 HAMILTON WATCH CO. U.S.A. UNDER CENTER SECONDS WHEEL, ADJ TEMP. AND 6 POS. UNDER CENTER SECONDS BRIDGE. 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS ALL BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS BU. AERO. U.S. NAVY ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 1300254 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS; NONE MOVEMENT NO. 4C192 HAMILTON WATCH CO. U.S.A. UNDER CENTER SECONDS WHEEL, ADJ TEMP. AND 6 POS. UNDER CENTER SECONDS BRIDGE. 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS ALL BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS BU. AERO. U.S. NAVY ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 907480 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AIRCRAFT NAVIGATIONAL WATCH BOX BU.AERO.U.S.NAVY CONTRACT NOa(s)-2276 F.S.S.C. NO.88-B-860 HAMILTON WATCH CO. https://ihc185.infopop.cc/eve/forums/a/ga/ul/89510...neimg/Y/A_4992B_.jpg PART NO. AN 5740 MFR:S PART NO. 4992B SERIAL NO. 765-41 CONTRACT NO. 86366 HAMILTON WATCH CO. MOVEMENT NO. 4C554 HAMILTON WATCH CO. U.S.A. UNDER CENTER SECONDS WHEEL, ADJ TEMP. AND 5 POS. UNDER CENTER SECONDS BRIDGE. 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS ALL BOLD ITALIC. ADJ. TEMP. AND 5 POSITIONS BU. AERO. U.S. NAVY ALL BLOCK FONT. CASE, KEYSTONE BASE METAL SER.I3OO916 THE 916 IS SMALLER. DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS https://ihc185.infopop.cc/eve/f..._4992b_ser.4C554.jpg https://ihc185.infopop.cc/eve/f...ck-174992B_4C554.jpg AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-60 CONTRACT NO. W535 ac-22375(5894) HAMILTON WATCH CO. MOVEMENT NO. 4C857 HAMILTON WATCH CO. U.S.A. UNDER CENTER SECONDS WHEEL, ADJ TEMP. AND 6 POS. UNDER CENTER SECONDS BRIDGE. 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS ALL BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL #1327411 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH DIVISION, BLUE HOUR AND MINUTE HANDS PURPLE SWEEP SECOND HAND PART NO. AN 5740 MFR:S PART NO. 4992B SERIAL NO. 524-43 CONTRACT NO. 86366 HAMILTON WATCH CO. MOVEMENT NO. 4C989 HAMILTON WATCH CO. U.S.A. UNDER CENTER SECONDS WHEEL, ADJ TEMP. AND 5 POS. UNDER CENTER SECONDS BRIDGE. 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS ALL BOLD ITALIC. ADJ. TEMP. AND 5 POSITIONS BU. AERO. U.S. NAVY ALL BLOCK FONT. CASE, KEYSTONE BASE METAL SER.I373050 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO. 33106 SERIAL NO. H-12193 HAMILTON WATCH CO. MOVEMENT NO. 4C1244 HAMILTON WATCH CO. U.S.A. UNDER CENTER SECONDS WHEEL, ADJ TEMP. AND 5 POS. UNDER CENTER SECONDS BRIDGE. 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS ALL BOLD ITALIC. ADJ. TEMP. AND 5 POSITIONS BU. AERO. U.S. NAVY ALL BLOCK FONT. CASE, KEYSTONE silver .800 fine SER#.K045296 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HAND --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-23004 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO.4C1176 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 756431 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS ORDNANCE DEPARTMENT U.S.A. NO. OE 16804 MOVEMENT NO.4C1651 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL DIAL, 12 HOUR HAMILTON BLACK FACE WHITE NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH DIVISION, WHITE HOUR AND MINUTE HANDS WHITE SWEEP SECOND HAND WITH RED TIP https://ihc185.infopop.cc/eve/forums/a/ga/ul/20510...g/Y/Image009_(2).JPG https://ihc185.infopop.cc/eve/forums/a/ga/ul/90510...g/Y/Image010_(2).JPG https://ihc185.infopop.cc/eve/forums/a/ga/ul/35510...g/Y/P1050012_(3).JPG (2) 4992b movements converted to 3992b .. serial number 4c1656; case number 1327617, and 4c1657; case number 1327627 AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-2238 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO.4C1821 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS https://ihc185.infopop.cc/eve/forums/a/ga/ul/72410...ineimg/Y/4992b-1.jpg https://ihc185.infopop.cc/eve/forums/a/ga/ul/82410...ineimg/Y/4992b-2.jpg AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-2284 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO.4C1828 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS IN ORIGINAL CARDBOARD BOX MATCHING SERIAL NO.AC-42-2284 https://ihc185.infopop.cc/eve/forums/a/ga/ul/83310...1/inlineimg/Y/C3.jpg https://ihc185.infopop.cc/eve/forums/a/ga/ul/73310...1/inlineimg/Y/C2.jpg https://ihc185.infopop.cc/eve/forums/a/ga/ul/63310...1/inlineimg/Y/C1.jpg AN5740 MFR’S PART NO.4992B SERIAL NO.AC-1986 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO.4C1942 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL DIAL, 12 HOUR G.C.T. WHITE THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH FIFTH DIVISION AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-1136 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO.4C2455 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 756431 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-2207 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO.4C2545 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL xxxxxx DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-2809 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO.4C2737 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 1328509 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-2602 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO.4C2844 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 1328509 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS NAVIGATION MASTER WATCH W. Co. Part No. 33106 6645-526-7374 CONTRACT NO. DCH-B-62767-2 U.S. MOVEMENT NO.4C3014 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL P119821 DIAL, 12 HOUR HAMILTON. WHITE THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH DIVISION AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-35316 CONTRACT NO. W535 ac-98072 HAMILTON WATCH CO. MOVEMENT NO.4C3110 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 758853 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS NONE MOVEMENT NO.4C3169 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. GOVT ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 5B3343 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS NONE MOVEMENT NO.4C3206 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 1329373 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-2474 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO.4C3338 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. ARMY AIR CORPS ALL BLOCK FONT. CASE, KEYSTONE BASE METAL 1330848 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-2333 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO. 4C4225 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL #1331071 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS LEATHER CASE, PROPELLER WING INSIGNIA AN5740 MFR’S PART NO.4992B SERIAL NO.AC-42-3601 CONTRACT NO. W535 ac-22375 HAMILTON WATCH CO. MOVEMENT NO. 4C4245 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. GOVT. BOLD BLOCK FONT. CASE, KEYSTONE BASE METAL #1329972 DIAL, 12-24 HOUR HAMILTON WHITE FACE BLACK NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH FIFTH DIVISION, BLACK HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS NONE MOVEMENT NO.4C4798 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. GOVT ALL BLOCK FONT. CASE, KEYSTONE BASE METAL xxxxx DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS ------------------------------------------------------------------------------------------------------------------- PART NO. AN5740 MFR'S PART NO. 4992B SERIAL NO. 1570-43 CONTRACT NO. 86366 HAMILTON WATCH CO. MOVEMENT NO. 4C5606 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT BLOCK FONT. CASE-KEYSTONE BASE METAL 1373750. DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS original Hamilton 4992B box and soft cloth storage bag not for this watch WATCH; NAVIGATION, MASTER Part No. AN 5740 Mfr's. Part No. 4992B BU. Aero. U.S. NAVY Contract NOa(s) 1811 Serial No. 17-8007 HAMILTON WATCH COMPANY Lancaster, Penna. U.S.A. AN5740 MFR’S PART NO. 33106 SERIAL NO. H- 134 HAMILTON WATCH CO. MOVEMENT NO 4C5615 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE SILVER .800 FINE K016816 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS https://ihc185.infopop.cc/eve/forums/a/ga/ul/62910...nlineimg/Y/4992B.jpg PART NO. AN 5740 MFR:S PART NO. 4992B SERIAL NO. 478-43 CONTRACT NO. 86366 HAMILTON WATCH CO. MOVEMENT NO. 4C6528 HAMILTON WATCH CO. U.S.A. UNDER CENTER SECONDS WHEEL, ADJ TEMP. AND 6 POS. UNDER CENTER SECONDS BRIDGE. 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS ALL BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL SER.xxxxx DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AF42-27988 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO.4C7180 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL xxxxxx DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS PART NO. AN5740 MFR'S PART NO. 4992B SERIAL NO. 637-42 CONTRACT NO. 86366 HAMILTON WATCH CO. MOVEMENT NO. 4C8130 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT BLOCK FONT. CASE-KEYSTONE BASE METAL 1374285. DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.XXXXX SERIAL NO.AC-XX-XXXX CONTRACT NO. XXXX ac-XXXXX HAMILTON WATCH CO. MOVEMENT NO. 4C9747 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 004142 DIAL 12 HOUR AN5740 MFR’S PART NO. 4992B SERIAL NO.AC-42-6526 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C9947 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 000694 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AF-42-37206 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C12134 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 668240 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH DIVISION, BLACK HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AF-42-4529 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C12205 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL XXXXXX DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AF-42-13916 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C18004 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 665871 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH DIVISION, PART NO. AN5740 MFR'S PART NO. 4992B SERIAL NO. 2492-42 CONTRACT NO. 86366 HAMILTON WATCH CO. MOVEMENT NO. 4C19646 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT BLOCK FONT. CASE-KEYSTONE SILVER .800 FINE 4680079 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS https://ihc185.infopop.cc/eve/f...8332/inlineimg/Y/Bob's_4992B.jpg PART NO. AN5740 MFR'S PART NO. 4992B SERIAL NO. AF-49-1487 CONTRACT NO.W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C22996. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT BLOCK FONT. CASE KEYSTONE BASE METAL xxxxxx DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN 5740 MFR’S PART NO. 33106 SERIAL NO. H- 557 HAMILTON WATCH CO. MOVEMENT NO.4C23152 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC U.S. GOVT. BLOCK FONT. CASE, KEYSTONE SILVER .800 FINE K017214 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS ***** library gives ....sold on 4/30/43 to account 64-12861 AN5740 MFR'S PART NO.4992B SERIAL NO. AF-42-12886 CONTRACT NO.W535ac-28072 HAMILTON WATCH CO. MOVEMENT NO.4C24297. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT BLOCK FONT. CASE KEYSTONE BASE METAL xxxxxx DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS PART NO.AN 5740 MFR’S PART NO.4992B SERIAL NO. 4905-42 CONTRACT NO. 86366 HAMILTON WATCH CO. MOVEMENT NO. 4C27610 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE SILVER .800 FINE 4693344 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS PART NO.AN 5740 MFR’S PART NO.4992B SERIAL NO. 74-43 R88-W-510 CONTRACT NO. 86366 HAMILTON WATCH CO. MOVEMENT NO.4C27777 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 1373075 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS; NONE MOVEMENT NO 4C29697 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 664111 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS CASE,CARRING,WATCH NAVIGATION U.S. ARMY A.C. GEO. H. ADAMSON TECUMSEH MICHIGAN,U.S.A. AN 5740 MFR’S PART NO. 33106 SERIAL NO. H-3605 HAMILTON WATCH CO. R88-W-510 MOVEMENT NO.4C32226 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE SILVER .800 FINE K019870 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-19515 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO.. MOVEMENT NO.4C34031. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT BLOCK FONT. CASE KEYSTONE BASE METAL 754105 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS Number on case under crystal 0754105 Brown Cloth Box Labeled AN 5740 Mfrs. Part No. 4992B U.S. ARMY AIR FORCE Contract # W535 AC-28072 Serial No. AF4219515 AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-19135 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO.. MOVEMENT NO.4C34347. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT BLOCK FONT. CASE KEYSTONE BASE METAL 751115 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS; NONE MOVEMENT NO.4C34466. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT BLOCK FONT. CASE KEYSTONE SILVER .800 FINE K015639 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-20014 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO. MOVEMENT NO.4C35723. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT CASE KEYSTONE BASE METAL 770345 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS Number on case under crystal 0770345 MARKINGS; NONE MOVEMENT NO.4C36274. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT BLOCK FONT. CASE KEYSTONE DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AF-42-77577 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C37068 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 668131 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS ----------------------------------------------------------------------------------------- MARKINGS; NONE MOVEMENT NO.4C40065 . HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. CASE KEYSTONE .800 FINE SILVER K017606 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN 5740 MFR’S PART NO. 33106 SERIAL NO. H- 1915 HAMILTON WATCH CO. MOVEMENT NO.4C43828 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE SILVER .800 FINE K018157 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS https://ihc185.infopop.cc/eve/forums/a/ga/ul/34910...nlineimg/Y/129_o.jpg https://ihc185.infopop.cc/eve/forums/a/ga/ul/22010...nlineimg/Y/126_o.jpg https://ihc185.infopop.cc/eve/forums/a/ga/ul/54610...nlineimg/Y/127_o.jpg https://ihc185.infopop.cc/eve/forums/a/ga/ul/56610...nlineimg/Y/128_o.jpg AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-32306 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO. MOVEMENT NO.4C46028. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT CASE KEYSTONE BASE METAL 751439 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AF-42-32448 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C46446 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. CASE, KEYSTONE BASE METAL 769620 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS WATCH NAVIGATION MASTER MS 28076 MFR’S. 33106 DA-36-038-ORD-21409-M SERIAL NO. 23421 HAMILTON WATCH CO. U.S.N. MOVEMENT NO.4C47777 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO. 33106 SERIAL NO.AF43-23757 CONTRACT NO. W535 ac-40783 HAMILTON WATCH CO. MOVEMENT NO 4C48370 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC U.S. GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 917414 DIAL 24 HOUR BLACK "HAMILTON" in white block letters in place of G.C.T. marking. WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO. 33106 SERIAL NO. H-8339 HAMILTON WATCH CO. R88-W-510 MOVEMENT NO. 4C48548 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE SILVER .800 FINE 30401 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS; NONE MOVEMENT NO. 4C48664 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC U.S. GOVT. BLOCK FONT. CASE, KEYSTONE SILVER .800 FINE K019585 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS PART NO. AN5740 MFR’S PART NO. 4992B SERIAL NO. AF-42-5300 CONTRACT No. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C49132 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE Base metal, 000581 DIAL 24 HOUR G.C.T. BLACK dial WHITE HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS; NONE MOVEMENT NO 4C51376 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC U.S.GOVT. BLOCK FONT. CASE, KEYSTONE BASE METAL 760905 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH DIVISION, BLACK HOUR ,MINUTE AND SWEEP SECOND HAND AN 5740 MFR'S PART NO. 33106 SERIAL NO. H- 10877 HAMILTON WATCH CO. MOVEMENT NO 4C54558 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE SILVER .800 FINE K046005 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO.4992B SERIAL NO.AF-42-34333 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C54584 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. CASE, KEYSTONE BASE METAL 754463 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-39664 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO. MOVEMENT NO.4C56818. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. CASE KEYSTONE BASE METAL 759772 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS Number on case under crystal 0759772 AN5740 MFR’S PART NO.4992B SERIAL NO.AF-42-34357 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO. 4C57428 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4992B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. CASE, KEYSTONE BASE METAL 772169 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO. 33106 SERIAL NO. H-8019 HAMILTON WATCH CO. R88-W-510 MOVEMENT NO. 4C59419 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE SILVER .800 FINE xxxxx DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO. 33106 SERIAL NO. H- 8079 HAMILTON WATCH CO. MOVEMENT NO 4C59995 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE SILVER .800 FINE K043615 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AIRCRAFT NAVIGATIONAL WATCH BOX BU.AERO.U.S.NAVY CONTRACT NO. N156s-20403 F.S.S.C. NO.88-B-860 TOPHAMS INC. https://ihc185.infopop.cc/eve/forums/a/ga/ul/13310...g/Y/Image013_(2).JPG https://ihc185.infopop.cc/eve/forums/a/ga/ul/56310...g/Y/P1080005_(2).JPG https://ihc185.infopop.cc/eve/forums/a/ga/ul/49310...g/Y/P1080003_(3).JPG https://ihc185.infopop.cc/eve/forums/a/ga/ul/12510...g/Y/P1080009_(2).JPG https://ihc185.infopop.cc/eve/forums/a/ga/ul/53510...g/Y/P1080018_(2).JPG -------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------- ART NO.AN 5740 MFR’S PART NO.4992B SERIAL NO. AF 42-23831 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO. MOVEMENT NO.4C60413 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. CASE, KEYSTONE BASE METAL 749307 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS new in the original box https://ihc185.infopop.cc/eve/forums/a/ga/ul/47010...eimg/Y/Outer_Box.JPG https://ihc185.infopop.cc/eve/forums/a/ga/ul/59010...img/Y/Movement_1.JPG https://ihc185.infopop.cc/eve/forums/a/ga/ul/11110...g/Y/Ord_Markings.JPG https://ihc185.infopop.cc/eve/forums/a/ga/ul/13110...inlineimg/Y/Dial.JPG MARKINGS; NONE MOVEMENT NO. 4C64616 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE SILVER .800 FINE K045913 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO. 33106 SERIAL NO. H-3401 HAMILTON WATCH CO. MOVEMENT NO 4C65035 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE SILVER .800 FINE K020904 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN 5740 MFR’S PART NO. 33106 SERIAL NO. H-8436 HAMILTON WATCH CO. MOVEMENT NO.4C65998 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4922B 22 JEWELS ADJ. TEMP. AND 6 POSITIONS CASE - KEYSTONE SILVER .800 FINE K042320 Marked on case back and case perimeter mating surface with an extra zero preceding the case number DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-39703 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO.. MOVEMENT NO.4C66983. HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. CASE KEYSTONE BASE METAL 770813 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS Number on case under crystal 0770801 AN5740 MFR’S PART NO. 33106 SERIAL NO.AF43-7216 CONTRACT NO. W535 ac-40783 HAMILTON WATCH CO. MOVEMENT NO 4C67043 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 886165 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS ,BLACK HOUR ,MINUTE AND SWEEP SECOND HAND AN 5740 MFR'S PART NO. 4992B SERIAL NO. AF-42-18444 CONTRACT NO. W535 ac-28072 HAMILTON WATCH CO. MOVEMENT NO.4C69821 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN 5740 MFR’S PART NO. 33106 SERIAL NO. H-10696 HAMILTON WATCH CO. R88-W-510 MOVEMENT NO.4C70015 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC. U.S. GOVT. BLOCK FONT. CASE, KEYSTONE SILVER .800 FINE K045080 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AIRCRAFT NAVIGATIONAL WATCH BOX BU.AERO.U.S.NAVY CONTRACT NO. N 288 S-14080 F.S.S.C. NO.88-B-860 THE PILLIOD CABINET CO. MARKINGS; NONE MOVEMENT NO 4C71390 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE SILVER .800 FINE K046644 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS; NONE MOVEMENT NO 4C72634 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 548411 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN 5740 MFR’S PART NO. 33106 SERIAL NO. H- 10205 HAMILTON WATCH CO. MOVEMENT NO.4C73374 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE SILVER .800 FINE K044236 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740 MFR’S PART NO. 33106 SERIAL NO.AF43-20058 CONTRACT NO. W535 ac-40783 HAMILTON WATCH CO. MOVEMENT NO 4C78168 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 911592 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS MARKINGS; NONE MOVEMENT NO 4C79415 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 757387 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH DIVISION, BLACK HOUR ,MINUTE AND SWEEP SECOND HAND AN 5740 MFR'S PART NO. 33106 SERIAL NO.AF43- 26583 CONTRACT NO. W535 ac - 40783 HAMILTON WATCH CO. MOVEMENT NO. 4C88189 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 291143 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS https://ihc185.infopop.cc/eve/forums/a/ga/ul/18410...neimg/Y/IMG_2609.jpg https://ihc185.infopop.cc/eve/forums/a/ga/ul/42510...neimg/Y/IMG_2622.jpg https://ihc185.infopop.cc/eve/forums/a/ga/ul/36510...neimg/Y/IMG_2626.jpg MARKINGS; NONE MOVEMENT NO 4C89162 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 772149 DIAL, 12 HOUR HAMILTON WHITE FACE BLACK NUMBERS THE OUTER MINUTE ORBIT IS GRADUATED IN 60 EVEN DIVISIONS NUMBERED AT EACH DIVISION, BLACK HOUR ,MINUTE AND SWEEP SECOND HAND AN 5740 MFR'S PART NO. 33106 SERIAL NO.43- 29174 CONTRACT NO. W535 ac - 40783 HAMILTON WATCH CO. MOVEMENT NO. 4C91512 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 923703 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS number on case under crystal-0888942 AN5740 FSSC NO. 88-W-510 MFR’S PART NO. 33106 SERIAL NO.H-13140 CONTRACT NO. NOa(s)-3122 HAMILTON WATCH CO. MOVEMENT NO 4C92040 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 113852 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS (In cardboard box) AN5740 FSSC NO. 88-W-510 MFR’S PART NO. 33106 SERIAL NO.H-13206 CONTRACT NO. NOa(s)-3122 HAMILTON WATCH CO. MOVEMENT NO 4C95391 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 112106 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS AN5740-1 STOCK NO.6645- 663-7694 MFR'S. PART NO. 33106 CONTRACT NUMBER DA-36-038-ORD-20782M SERIAL NO. 23060 HAMILTON WATCH COMPANY MOVEMENT NO. 4C98020 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B (NUMBERS DECREASE IN SIZE TO THE B), 22 JEWELS BOLD ITALIC. ADJ. TEMP. AND 6 POSITIONS U.S. GOVT. BLOCK FONT. CASE, STAR WATCH CASE CO. BASE METAL P115499 DIAL 24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS  | ||
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AN5740 MFR'S PART NO. 4992B SERIAL NO. 2492-42 CONTRACT NO. 86366 HAMILTON WATCH CO. MOVEMENT NO. 4C19646 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4992B 22 JEWELS, ADJ. TEMP. 6 POSITIONS, U.S. GOVT CASE-KEYSTONE SILVER .800 FINE 4680079 DIAL-24 HOUR G.C.T. BLACK WHITE HOUR MINUTE AND SWEEP SECOND HANDS  | |||
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IHC Life Member |
Scott here is one I have: AN5740 MFR'S. PART NO. 33106 CONTRACT NUMBER DA-36-038-ORD-9888 SERIAL NO. AF-52-8259 HAMILTON WATCH CO. MOVEMENT NO. 4C101667 ADJ TEMP AND 6 POS UNDER CENTER SECONDS BRIDGE. 4992B 22 JEWELS ON SEPERATE PLATE CASE KEYSTONE BASEMETAL #K359316 DIAL 24 HOUR G.C.T BLACK WHITE HOUR, MINUTE AND SECOND HANDS Hope this helps Doug  | |||
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| IHC Life Member Sergeant at Arms |
______________________________ AN5740 MFR’S PART NO. 33106 SERIAL NO.AF43-12340 CONTRACT NO. W535 ac-40783 HAMILTON WATCH CO. MOVEMENT NO 4C140736 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, 4922B 22 JEWELS (ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, BASE METAL ___________ DIAL 24 HOUR G.C.T BLACK WHITE HOUR, MINUTE AND SWEEP SECOND HANDS ______________________________ I am posting this to show HAMILTON WATCH CO. U.S.A. UNDER CENTER SECONDS WHEEL,  | |||
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| Life Achievement Military Expert  |
Good idea, Scott. Here is another one: AN5740 MFR’S PART NO. 33106 SERIAL NO.AF43-23757 CONTRACT NO. W535 ac-40783 HAMILTON WATCH CO. MOVEMENT NO 4C48370 HAMILTON WATCH CO. U.S.A. ABOVE CENTER SECONDS WHEEL, BOLD BLOCK 4922B 22 JEWELS U.S.Govt.(ROTATED 90 DEGREES ON PLATE) ADJ. TEMP. AND 6 POSITIONS BOLD ITALIC CASE, KEYSTONE BASE METAL 917414 DIAL 24 HOUR BLACK "HAMILTON" in white block letters in place of G.C.T. marking. WHITE HOUR MINUTE AND SWEEP SECOND HANDS Best regards, Greg | |||
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| IHC Life Member Sergeant at Arms |
Aloha Greg This will be a detailed list of 4992Bs by movement number. That way anyone can use it to see where their watch fits into the time line. Already, I can see anomalies in case numbers verses movement numbers in relation to contract numbers. As the number of examples increase, and backed by your research, we can fill in the holes on movements without case markings. Early movements that were most likely issued to bomber command, that may or may not have survived the war. Approximately when did Hamilton stop marking the plates U.S.ARMY AIR CORP. and start marking them U.S. GOVT.? When did that marking go away? Any suggestions that you or others have would be welcome. Mahalo Scott AD INEXPLORATA | |||
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I have another one: AN5740 MFR'S PART NO. 4992B SERIAL NO. AF-42-18444 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO. Movement S/N is 4C69821 Don, How does one get access to the library to find out more information about our watches? | ||||
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| Site Administrator IHC Life Member  |
AN 5740 MFR'S PART NO. 33106 SERIAL NO.AF43- 26583 CONTRACT NO. W535 ac - 40783 HAMILTON WATCH CO. Movm't # 4C88189 | |||
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| IHC Life Member Sergeant at Arms |
Mahalo Men I have added them to the list. I took some liberty in extrapolating case and dial configuration for your watches correct me if I am wrong, also, case no. Mahalo P.S. I will be adding 3992B to the list. Aloha Scott | |||
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| IHC Life Member Site Moderator  |
Scott, I have a few to add: 4C60413 Keystone Base Metal Case, 749307 with ord markings this one is essentially new in the original box (see below) so I know that the case and movement go together 4C136644 Star, Base Metal P116789 with ord markings Near mint - appears to be original case 4C131485 Star, Base Metal P098792 with ord markings Near mint - appears to be original case 4C48664, US Govt on movement Keystone, Silver, 0.800 fine, K019585, no ord markings 4C64616 Keystone, Silver 0.800 fine, K045913, no ord markings Case numbers do not all match 4C9747, US Govt on movement Keystone, Base Metal, 004142 converted to 12hr dial  | |||
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| IHC Life Member Site Moderator |
The movement for the watch in the box:  | |||
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| IHC Life Member Site Moderator |
Outer Case Markings:  | |||
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| IHC Life Member Site Moderator |
Dial: Note: all of mine except the one converted to 12 hr have the same dial/hands configuration.  | |||
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| IHC Life Member Sergeant at Arms |
Trial of Deck Watches of the Royal Observatory, Greenwich, in 1890 Chronometer makers who may care to send watches to the trial must first obtain permission from the Hydrographic, Admiralty, Whitehall, S.W., to whom all requests for such permission must be sent not later than October 6. The watches are to be deposited here between the hours of 10 and 1 on any day (excepting Sunday), during the week ending with October 20th, after which no watch can under any circumstances be received. The rating this year commences on Saturday, October 25 and will be as follows: Watch horizontal, dial up, in room for 6 weeks Watch horizontal, dial up, in oven for 1 week Watch vertical, pendant up, in oven for 4 days Watch vertical, pendant right, in oven for 3 days Watch vertical, pendant left, in oven for 3 days Watch vertical, pendant up, in oven for 4 days Watch horizontal, dial up, in oven for 1 week Watch horizontal, dial up, in room for 6 weeks The mean temperature in the oven will be from 80-85 degrees Fahrenheit. The watches are to be in silver cases with crystal glass, and each must bear a distinguishing No. engraved on the plate of the movement, Preference will be given to keyless watches. Each watch is to be labeled with its price, which is to include a mahogany box with ivory label, cleaning after trial and engraving the Government mark on the dial and plate of the movement, and the name of the maker, the No. of the watch, the letters D.W., and the Government mark on the ivory label of the box. WHM Christie Royal Observatory, Greenwich. Navigational timekeepers were defined by the Hydrographic Survey in four categories thus. H.S. 1. The master chronometer with detent escapement. These were tested at Greenwich before 1914 and after that time at the National Physical Laboratory at Kew. H.S.2. The chronometer watch, formerly known as the deck watch had a lever movement, was adjusted for temperature and in five positions. These were also tested. H.S.3. These were small watches, most 16 or 19 size with lever escapements, adjusted for temperature and in two positions. Most of the examples found have been of a much higher standard, adjusted in five or six positions. H.S.4. These timekeepers were large or small cockpit instruments with different specifications. | |||
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Here are the serial numbers to the two 4992b's I once owned. I have the case information here somewhere and I will post it when I locate the information. serial # 4C51542 and serial # 4C130817 Ray | ||||
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AN5740-MFR'S PART NO. 33106-SERIAL NO.43- 29174- CONTRACT NO.-W535ac-40783-HAMILTON WATCH CO. movement #4C91512 inside back cover-keyston-base metal-923703 number on case under crystal-0888942 | ||||
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Heres one I have No military markings on case mvt #4C40065 no military markings on mvt. case # keystone .800 fine silver K017606 | ||||
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| IHC Life Member Site Moderator  |
Here is the info on the 4992B I have; AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-39703 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO. Inside back KEYSTONE BASE METAL 770813 Movement Serial # 4C66983 no government markings on movement Number on case under crystal 0770801 AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-20014 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO. Inside back KEYSTONE BASE METAL 770345 Movement Serial # 4C35723 U.S. GOVT markings on movement Number on case under crystal 0770345 AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-39664 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO. Inside back KEYSTONE BASE METAL 759772 Movement Serial # 4C56818 no government markings on movement Number on case under crystal 0759772 AN5740 MFR'S PART NO. 4992B SERIAL NUMBER AF-42-19515 CONTRACT NO. W535ac-28072 HAMILTON WATCH CO. Inside back KEYSTONE BASE METAL 754105 Movement Serial # 4C34031 U.S. GOVT markings on movement Number on case under crystal 0754105 Brown Cloth Box Labeled AN 5740 Mfrs. Part No. 4992B U.S. ARMY AIR FORCE Contract # W535 AC-28072 Serial No. AF4219515 | |||
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Here is my info: Movement No. 4C34466 Case KEYSTONE SILVER .800 FINE K015639 Dial Black 24 Hour G.C.T. Back of case not engraved  | ||||
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Face of watch  | ||||
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Case back....  | ||||
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| IHC Life Member Site Moderator |
Jeff You are luck, you got one of the silver ones, the backs were engraved but wore off the silver ones. Nice watch. Tom | |||
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Welcome Aboard IHC185™ Internet Horology Club 185 IHC185™ Discussion Site Main Page Horological Discussions, Questions and Answers Military Timepiece Discussions - EXCLUSIVE! Evolution Of 4992B and 3992B Markings, Numbers and Database
Internet Horology Club 185 IHC185™ Discussion Site Main Page Horological Discussions, Questions and Answers Military Timepiece Discussions - EXCLUSIVE! Evolution Of 4992B and 3992B Markings, Numbers and Database©2002-2023 Internet Horology Club 185™ - Lindell V. Riddle President - All Rights Reserved Worldwide
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