Extreme Performance The Rolex Deepsea is built for the deepest dives, offering unparalleled water resistance and strength. With its Ringlock System and helium escape valve, it is a technical masterpiece designed for professional divers and underwater explorers. Robust Construction This 44mm Rolex Deepsea, reference 126660, features a black dial with Chromalight display and a rotatable bezel with 60-minute Cerachrom insert. Powered by the calibre 3235 automatic movement with a 70-hour power reserve, it is fitted with an Oyster bracelet secured by Fliplock and Rolex Glidelock extension systems.