Engineered for Depth The Rolex Deepsea is a professional divers watch built to withstand the most extreme underwater conditions. With its innovative Ringlock System and robust construction, it is a trusted tool for deep-sea exploration. Ocean Proven This reference 116660 from 2016 features a 44mm Oystersteel case with a gradient blue-to-black dial and a unidirectional rotatable bezel with a 60-minute scale. The Oyster bracelet is equipped with a Fliplock extension and Rolex Glidelock system for secure wear over a wetsuit. Powered by the calibre 3135 automatic movement, this model offers a 48-hour power reserve and exceptional performance at great depths.