First time on the wrist! A mid-1950s Certina, Kurth-Certina caliber 28-451, automatic, calendar. Thanks to OMB member Peatnick. Dial yet will need work, but it cleaned up quite a bit, leaving just enough of the original printing for the dial company to be able to duplicate it, when the time comes. Crown not original, but it will do for the time being. The K F Certina movement is a nice design for a caliber that is about 60 years old. Beautifully finished, and (I feel) are a rival for almost any comparable movement by any maker, for the era.