Oyster Perpetual Retail Prices The smaller sized OP versions, 28mm, 31mm, and 34mm, run on Caliber 2232, the self-winding movement with 55 hours of electricity reserve and patented Syloxi hairspring for improved resistance to magnetism. Conversely, the more substantial 36mm and 41mm Oyster Perpetual watches depend upon Caliber 3230, released https://peterm258zdf5.wikimeglio.com/user