Extreme Capability The Rolex Deepsea is a professional-grade dive watch engineered to meet the most demanding underwater conditions. Waterproof to an extraordinary depth of 3, 900 metres, it features the patented Ringlock System, a helium escape valve, and a robust Oyster case architecture. Built for the Deep This 2012 model, 116660, features a 44mm Oystersteel case and is powered by the calibre 3135 automatic movement, offering a power reserve of approximately 48 hours. The Oyster bracelet includes Fliplock, Oysterlock, and Rolex Glidelock extension systems for secure and adjustable wear.