Oyster Perpetual Retail Prices The lesser OP versions, 28mm, 31mm, and 34mm, run on Caliber 2232, the self-winding motion with fifty five hrs of electrical power reserve and patented Syloxi hairspring for improved resistance to magnetism. Conversely, the larger sized 36mm and 41mm Oyster Perpetual watches depend on Caliber 3230, https://charlesa210dio5.gynoblog.com/profile