Professional Depth The Rolex Sea-Dweller was created in 1967 to meet the demands of deep-sea divers. Engineered for saturation diving, it features a helium escape valve and robust construction, making it a true tool watch for professionals operating in extreme underwater environments. Classic Diver This 2006 model, 16600, features a 40mm Oystersteel case and is powered by the calibre 3135 automatic movement, offering a power reserve of approximately 48 hours. The Oyster bracelet is fitted with Fliplock and Oysterlock clasps for secure wear.