Extreme Performance The Rolex Deepsea was developed for professional divers seeking uncompromising performance at extreme depths. With its patented Ringlock System and robust construction, it represents the pinnacle of Rolexs underwater engineering. Engineered for Depth This reference, from 2010, features a 44mm Oystersteel case with a black dial and rotatable 60-minute bezel. Powered by the calibre 3135 automatic movement, it offers a 48-hour power reserve. The Fliplock and Rolex Glidelock clasp system ensures a secure fit over diving gear, while the Oyster bracelet provides durability and comfort. A formidable tool watch built for the deep.