Strength in Depth The Sea-Dweller extends Rolexs legacy of specialist diving instruments. Designed for saturation divers, it represents the pinnacle of underwater performance without compromising on structural elegance and robustness. Powerful Design This two-tone 43mm reference features a black dial and a unidirectional bezel in ceramic. Crafted in Oystersteel and yellow gold, it is secured by an Oyster bracelet with Glidelock adjustment. The calibre 3235 inside ensures 70 hours of power reserve under demanding conditions.