Ww2 era, Seiko 9150. It's missing the inner bezel and crystal, but there's a 50/50 chance its here somewhere (alot of the watches I thought were incomplete in all of this stuff I've found the missing parts so keeping my fingers crossed) needs a balance staff and some tlc. Dan
cool. this post sent me down a rabbit hole/time warp. spent about 2 hours researching this. The best site, was mwr who seem to have this mystery all but solved.... still open... but check it out!Patent 274740 - Seikosha Dust-Proof
Cool thanks Jeff. I had looked for the patent for a while but could not find it. I started cleaning and checking the movement today. This one is only a 4 jewel watch the pallets and roller are steel, it is quite worn out and probably not really worth it but still repairable.
