The Rolex Sea-Dweller Ref. 126600, introduced in 2017 to commemorate the model’s 50th anniversary, features a 43mm Oystersteel case and a unidirectional rotatable black Cerachrom bezel. Its black dial is accented by the iconic red “Sea-Dweller” text, a nod to the original 1967 model, and is equipped with Chromalight display for enhanced legibility in low light conditions. Powered by the in-house Caliber 3235 automatic movement, it offers a 70-hour power reserve and incorporates Rolex’s Chronergy escapement for improved efficiency and precision. The watch includes a helium escape valve and is water-resistant up to 1,220 meters (4,000 feet), making it suitable for deep-sea diving. Its Oyster bracelet features the Glidelock and Fliplock extension systems, allowing for secure and comfortable adjustments over diving suits.