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. A symbol of Rolexs enduring partnership with deep-sea pioneers, the Deepsea is a technical masterpiece designed for precision, reliability, and resilience in the harshest environments. Built for the Deep This 2008 reference 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 is equipped with the Oysterlock clasp and Rolex Glidelock extension system for secure and adjustable wear.