Ocean-Born Expertise The Sea-Dweller line embodies Rolexs decades-long relationship with the world of professional diving. Originally designed to withstand the depths, it remains a trusted companion for those who set their sights beneath the waves. Engineered for Extremes This 43mm Oystersteel edition, introduced in 2020, features a black dial and rotating timing bezel. Equipped with calibre 3235, it offers about 70 hours of autonomy, complemented by Fliplock and Glidelock systems on its Oyster bracelet for supreme security.