In the early 1940s, the British Ministry of Defense (MoD) published a set of specifications for a wristwatch to be issued to their soldiers. The specifications are commonly referred to as WWW, or Watch Wristlet Waterproof. Twelve companies submitted watches that met the criteria: Buren, Cyma, Eterna, Grana, Jaeger LeCoultre, Lemania, Longines, IWC, Omega, Record, Timor and Vertex.
If you’re into great vintage military watches, click here to read about the Mark 11 specification.
These twelve watches together are called the “Dirty Dozen” by military watch collectors. Interestingly, the second World War ended before these great watches could be issued to soldiers for combat duty.