Hi I've seen the above model in a local pawn shop it is listed as a cal 430 manual wind. A bit of googling doesn't show any of this model and cal combination listed. The 430 also isn't listed on the omega service price list. Any ideas?
Manual - quite small in diameter at 17.5 mm. I don't think I've worked on a 635 specifically, but have done some 625's and they ran fine. Cheers, Al