Oyster Perpetual Retail Price ranges The lesser OP variations, 28mm, 31mm, and 34mm, run on Caliber 2232, the self-winding motion with fifty five hrs of power reserve and patented Syloxi hairspring for enhanced resistance to magnetism. Conversely, the much larger 36mm and 41mm Oyster Perpetual watches rely on Caliber 3230, https://terryk256gwi4.thenerdsblog.com/profile