This is the watch as it was on arrival..
The 'kanji' day wheel was not working and the pusher at 2 o'clock was missing a retaining clip..
Note the picture of a scuba diver on the caseback and the words '40m perfect waterproof'..
The watch is now fully functional and temporarily on a black leather strap..
Here is the finished project and I think the brown leather strap goes well with the white dial..
I am guessing that this watch is from the 1960s..