c.1916 Omega 24 Hour Military style Trench Watch 
 
Watches with 24 hour dials were available to French Troops from about 1914  and even the British Navy adopted them early, however the British Army didn't adopt them till 1918 and the war was nearly over. 
 
The case was originally gold plated but over the last century a fair bit of the plate especially the sides and back have worn down, however on the wrist it's not very noticeable. The dial is in very good condition. 
 
The inner lid is signed Omega as is the Movement 
 
Cosmetically overall in good condition for its age and running strong