Engineered for Extremes The Rolex Deepsea is designed for professional divers and extreme underwater exploration. With its patented Ringlock System and helium escape valve, it represents the pinnacle of Rolexs dive watch engineering, offering unmatched performance at great depths. Professional Heritage This 2015 reference features a 44mm case and is powered by the calibre 3135 automatic movement, delivering a 48-hour power reserve. The Oyster bracelet is equipped with Fliplock and Glidelock systems for secure fit over diving gear. A rotatable bezel with 60-minute scale completes its professional-grade functionality.