With this one, who made the movement? Doesn't look like Omega's trench watches of the era.
And, there is no serial number on either the 15j movement or the case.
No import or export markings either. No metal composition, so I assume nickel.
Pre or Post 1918 for the watch? 1918+ dates the guard due to adverts. of the era.
Cool piece of History, though.
And nice Geneva stripes.
In line for COA soon.