The final 7 digits of the NSN are the item number, specific to the item itself.
Note the distinction between a serial number and an item number–the serial number is unique to each individual piece (every watch), whereas the item number is the same for every piece made of that type (all watches in a single contract).
Wristwatches may also be listed in other categories.
The guide is organized into a few major categories of markings, with a few examples in each category.
Using this guide, you should be able to develop a basic understanding of the issue markings on most military watches you encounter. This is the most common issue mark among all issued watches.
For a full list of Country Codes, see the NATO website here.
To browse FSGs and FSCs, the US Defense Logistics Agency website is a good spot.
Watches made specifically for the military and never for public sale will often have only one serial number, while watches with a civilian variant or adapted for military service may have both manufacturer and issuing agency serial numbers. Benrus Type 1, Sterile – Serial number is the only engraving on the caseback; British CWC G10 – Serial number second row from bottom; French Marine Nationale Casio G-Shock DW-9000 – Serial number is the only thing different than the civilian version of the watch Another very common case back marking on issued watches is a date.
On some issued watches, the serial number is the only mark seen; while on others, it’s the only feature that distinguishes the watch from an everyday civilian watch by the same manufacturer. It seems simple enough, but this one is a little less straightforward than the serial number.As is the case for any large organization, keeping track of contract items and inventory is a huge and important process in the military.With millions of items to track over decades of procurement, the US government developed a numeric system for keeping track of everything it buys and owns. The first battery-operated wristwatches were sold in 1957.Wristwatches are listed here by manufacturer or as advertising or character watches. ff3=4&toolid=10044&campid=5336649018&customid=wristwatch&lgeo=1&mpre= Again, this sometimes leads to confusion about when the watch actually found its way to someone’s wrist.