Extreme Depths The Rolex Deepsea is engineered for the most demanding underwater environments. As part of the Oyster Perpetual Sea-Dweller family, it is built to withstand extreme pressure, making it a trusted companion for professional divers and deep-sea explorers. Its robust construction and technical innovations reflect Rolexs commitment to underwater exploration. Pressure Ready This reference 116660 features a 44mm case and a black dial with Chromalight display for enhanced legibility in low-light conditions. The unidirectional rotatable bezel is calibrated for 60 minutes, ideal for dive timing. Powered by the calibre 3135 automatic movement, it offers a power reserve of approximately 48 hours. The Oyster bracelet is equipped with both Fliplock and Rolex Glidelock extension systems, ensuring a secure and adjustable fit over a wetsuit or dive gear.