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4992B Case-Back Markings "Click" to Login or Register 
Picture of Steven D. Jencso
posted
I just picked up a Hamilton 4992B with U.S. Govt. stamped on the movement. The back of the case contains the following:

Watch
Navigation Master
MS 28076
Mfr's 33106
DA-36-038-ORD-21409-M
Serial No 23421
Hamilton Watch Co
U.S.N.

These are not the standard markings that I have seen on a 4992B case. I did a search and found the National Maritime Museum website has a 4992B listed with a description of identical case markings (SN is different).

Does anyone have any information on the origin of these case markings?

Thanks,
-Steve
 
Posts: 266 | Location: Dover, New Hampshire U.S.A. | Registered: February 14, 2005
posted
From documentation I have seen, this case inscription was part of the contract description.

The contract spelled out the beginning serial number for the case marking and other info.
 
Posts: 1496 | Registered: November 20, 2002
IHC President
Life Member
Picture of Lindell V. Riddle
posted

Great link Steven,

Here are the other "4992B" listings in this forum...

Click to access all "4992B" through "Find-Or-Search" in Military Timepiece Discussions

I've noticed the earliest examples show the "Manufacturer's Part Number" as "4992B" on the case-back. Then later on "33106" replaces the 4992B grade number and 33106 becomes their part number.

These are great watches, there is a lot to discover in collecting and researching them.

Wink
 
Posts: 10553 | Location: Northeastern Ohio in the USA | Registered: November 19, 2002
posted
'

 
Posts: 1496 | Registered: November 20, 2002
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