The first six digits of the NSN have specific meanings that define what the item is and where it was registered.
This means that items of the same type will share many of the same digits, despite where and when they are coded.
Please have in mind that the time table for the Omega serial numbers is not 100% accurate but gets as close to /- 2 years Dating back your vintage Omega watch by using the serial number is the most exact way to identify your watch.
*Please note that the table is not 100% accurate but as close to /- 2 years.
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.
These numbers and symbols–sometimes on the dial and almost always on the case–can carry a number of different meanings.
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.
In 1953 they began government-wide use of the Federal Stock Number system, an 11-digit numeric code with place-specific digits to define both the type of thing and the specific thing itself.
In 1974 the code was formally made international and another two digits were added to denote an item’s country of registration.