I wanted to know about this watch.
I can not determine if it is 12 NVSI or 13 (or something different.)
When I measure the movement diameter it reads 28mm or just a little bit less, then it should be 12.4, (I don't know if a 12,4 "NVSI"exists , or may be a 12 NVSI?
But the only movement that I've found with exactly the same screws position, is the 13 NVSI , (but my movement should be 29mm in that case, ok?)
I have a table where it says my movement serial should be 1918, is that right?
Is this a military watch? or just a luxury one for that age?
Any help is welcome!