Extreme Engineering The Rolex Deepsea is built for the most demanding underwater environments. Engineered to withstand extreme depths, it represents the pinnacle of dive watch innovation and performance. Robust Capability This 2015 reference features a blue dial with large luminescent hour markers and a unidirectional 60-minute bezel. The 44mm Oystersteel case is fitted with an Oyster bracelet, Fliplock extension link, and Glidelock clasp. Powered by the calibre 3135 automatic movement, it offers a 48-hour power reserve and exceptional water resistance.