late '29 or early 30's. not sure if the case or case back is original something about the rough finishing of the steel suggests this. ..Dial, crown and movement appear to be ok. it's value depends quite a lot on the size of the dial..is it 23mm or 26.5 across? I don't know if they did much larger except for possibly aviator models. I don't think it's specifically military...the inside of the caseback might offer more info. Not a dial design I've seen before with the faded 3, 9, and 12 numerals. - considering it's age it looks in pretty good shape. Is it working?
as ever, others will know more....
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