I think what we have here is a Military Issue style watch, we have at least two others in the database, with the same kind of dial and hands.
However, this watch case has been heavily re-sculpted. The customer told me his repairman had mounted the case in a lathe and turned away quite a bit of metal. The back is ground completely flat and is now void of markings, and the lugs have been expertly (but heavily) sculpted, I could see raw machining textures. In addition, the solid internal movt ring was lost and was replaced by a flimsy sheet metal one.
I grabbed three quick pics but one did not turn out.
I'm going with 1945 because of the movement date symbol. The other examples:
Clearly, a lot of corrosion had happened, and the bezel back also has lost quite a bit of contour. The edges that mate with the caseback are filed flat. The watch is stainless steel, unlike some of the Military ones that are plated.
I should add that the case back was not octagonal, it is round with wrench indents. This leads me to suspect that it may be possible that the original case was replaced with this one, having been too far gone. I'm looking for other military type models with stainless cases, but the Air Warden has a snap back; this one is screw type.
This is probably fairly common, virtually all the old Military plated cases I see are corroded pretty badly. While it is possible to fill them in and re-plate them, the cost is fairly high.