Engineered for Depth The Rolex Deepsea is built to withstand the most extreme underwater conditions. With its innovative Ringlock System and exceptional water resistance, it represents the pinnacle of dive watch engineering. Uncompromising Strength This 2010 reference features a black dial with Chromalight display and a unidirectional 60-minute bezel. The 44mm Oystersteel case is fitted with an Oyster bracelet, Fliplock extension link, and Glidelock clasp. Inside, the calibre 3135 automatic movement delivers a 48-hour power reserve.