1940s Omega "Dirty Dozen" Military Watch Cal. 30T2

In the 1940s Omega was one of the "Dirty Dozen", which was a selection of 12 watch brands worn by WWII British soldiers. The "Dirty Dozen" brands were commissioned by the British Ministry of Defense, which needed as many watches as possible produced for the British soldiers. Manufacturing capacity at the time allowed for roughly 145,000 watches to be produced. Approximately 25,000 of these timepieces were manufactured by Omega.  

The arrow seen on the dial which is regularly seen on military watches marks the watch as "crown property"; the British monarch's sovereign public estate which was considered neither government property nor part of the monarch's private estate. 

The cal. 30T2 is a time-only manual wind movement that Omega created in 1939, and became a large benefactor for building Omega's early reputation of making accurate and quality timepieces. The cal. 30T2 is essentially a robust but simple base movement that is very versatile in its adaptability, in fact, variations of the cal. 30T2 was produced until 1963. This legendary movement wasn't only for civilian use either, as the British military issued a massive contract with Omega to produce timepieces for their soldiers that all housed a modified cal. 30T2 movement.