Oyster Heritage The Oyster Perpetual 31 is a refined expression of Rolexs foundational design. With its compact case and clean dial layout, this model reflects the brands dedication to clarity, precision and timeless style. Elegant and Precise This reference, from 2023, features a 31mm Oystersteel case with a domed bezel and coral red dial. Powered by the calibre 2232 automatic movement, it offers approximately 70 hours of power reserve. The Oyster bracelet is fitted with an Oysterclasp and Easylink extension for everyday comfort.