The Rolex Oyster Perpetual 31, reference 277200-0016, is cased in 31 mm Oystersteel, with a black dial and a domed bezel, on an Oyster bracelet. It is powered by the automatic Calibre 2232 movement, with a 55-hour power reserve. Water-resistant to 100 m (330 ft). Maker: Rolex. Reference: 277200-0016. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.