Extreme Engineering The Rolex Deepsea is a professional dive watch built to withstand the most demanding underwater conditions. Engineered for saturation diving, it combines technical innovation with a bold, purposeful design. Specialist Performance This 2009 reference 116660 features a 44mm case with a black dial and a rotatable 60-minute bezel. Powered by the calibre 3135 automatic movement with a 48-hour power reserve, it includes an Oyster bracelet secured by a Fliplock Oysterlock clasp with Rolex Glidelock extension system. A robust and reliable companion for deep-sea exploration.