Oyster Perpetual Retail Costs The scaled-down OP variations, 28mm, 31mm, and 34mm, operate on Caliber 2232, the self-winding movement with 55 hrs of electric power reserve and patented Syloxi hairspring for enhanced resistance to magnetism. Conversely, the greater 36mm and 41mm Oyster Perpetual watches depend on Caliber 3230, introduced in https://pauln876gwl4.newsbloger.com/profile