Internet Horology Club 185
Evolution Of 4992B and 3992B Markings, Numbers and Database

This topic can be found at:
https://ihc185.infopop.cc/eve/forums/a/tpc/f/990103944/m/9361038332

February 16, 2007, 22:18
Scott A. Whittey
Evolution Of 4992B and 3992B Markings, Numbers and Database

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
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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
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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



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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

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----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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

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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.

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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

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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


February 17, 2007, 08:19
Bob Kapinos
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


February 17, 2007, 08:37
Douglas Addy
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


February 17, 2007, 22:26
Scott A. Whittey
______________________________


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,
February 20, 2007, 23:48
Greg Crockett
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
February 22, 2007, 23:17
Scott A. Whittey
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
August 03, 2007, 08:47
Dan Shatrau
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?
August 04, 2007, 06:32
Phillip Sanchez
AN 5740
MFR'S PART NO. 33106
SERIAL NO.AF43- 26583
CONTRACT NO.
W535 ac - 40783
HAMILTON WATCH CO.
Movm't # 4C88189
August 04, 2007, 18:25
Scott A. Whittey
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
September 12, 2007, 01:45
John J. Flahive III
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


September 12, 2007, 01:46
John J. Flahive III
The movement for the watch in the box:


September 12, 2007, 01:48
John J. Flahive III
Outer Case Markings:


September 12, 2007, 01:51
John J. Flahive III
Dial:

Note: all of mine except the one converted to 12 hr have the same dial/hands configuration.


November 29, 2007, 14:55
Scott A. Whittey
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.
December 11, 2007, 18:49
Ray Hallenbeck
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
February 27, 2008, 22:39
Kenneth T. Ward
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
June 26, 2008, 20:15
Bill Manders
Heres one I have
No military markings on case
mvt #4C40065 no military markings on mvt.
case # keystone .800 fine silver K017606
June 26, 2008, 23:41
Tom Brown
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
March 06, 2009, 00:50
Jeff Ellis
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


March 06, 2009, 00:54
Jeff Ellis
Face of watch


March 06, 2009, 00:56
Jeff Ellis
Case back....


March 06, 2009, 01:41
Tom Brown
Jeff

You are luck, you got one of the silver ones, the backs were engraved but wore off the silver ones. Nice watch.

Tom