Oyster Perpetual Retail Charges The smaller OP versions, 28mm, 31mm, and 34mm, operate on Caliber 2232, the self-winding movement with 55 hours of electrical power reserve and patented Syloxi hairspring for improved resistance to magnetism. Conversely, the bigger 36mm and 41mm Oyster Perpetual watches rely upon Caliber 3230, launched in https://eddier988jbs7.blog4youth.com/profile