I bought it in Germany.
The band was really old and dirty, like an old and used watch that remains 30 years in a box, forgotten after it's owner's dead.

If military watch, it was probably an officer watch.

Let's say it was forgotten during the 1970, an officer of 35 years old in 1938 is 70 during the seventies, and may be die.

The seller was not a professional, so I mean he didn't seem to be a person going very far to buy a watch for selling it after in his country.

Right or not, I should say it could be a german military watch.