Extreme Engineering The Rolex Deepsea is a professional divers watch built for the most challenging underwater environments. With its patented Ringlock System and robust construction, it offers exceptional pressure resistance and enduring performance. Built for the Deep This 2017 model features a 44mm Oystersteel case with a black Cerachrom bezel and a vivid blue dial. The Oyster bracelet is equipped with a Fliplock Oysterlock clasp and Rolex Glidelock extension system for a secure fit over diving gear. Powered by the calibre 3135 automatic movement, it delivers a 48-hour power reserveready for the depths.