Rolex SeaDweller

Rolex SeaDweller created the Oyster Perpetual Sea‑Dweller in 1967 to meet the challenge of prolonged underwater missions. Subsequently improved in close partnership with Comex (Compagnie Maritime d’Expertises) professionals, it is now waterproof to 1,220 metres (4,000 feet). The Sea‑Dweller is specifically designed for saturation diving. Thanks to its helium escape valve, it can withstand decompression on ascent and master the return to the surface – the final phase of deep-sea exploration.

A key feature of the Rolex SeaDweller and all Rolex divers’ watches, the unidirectional rotatable bezel is fitted with a 60-minute graduated monobloc Cerachrom bezel insert. This vital divers’ tool measures immersion time with precision.

Manufactured by Rolex and patented, the Cerachrom bezel insert is made of high-technology ceramic. It is extremely hard, virtually scratchproof, and its colour is inalterable. The moulded, recessed graduations and numerals are coated with contrasting platinum or yellow gold via PVD (Physical Vapour Deposition).

The bezel can also be turned with ease, even when wearing gloves, thanks to a knurled edge that offers excellent grip.

Now waterproof to 1,220 metres (4,000 feet), the Rolex SeaDweller is fitted with a Triplock winding crown that reinforces the impermeability of its 43 mm Oyster case. This screw-down crown was invented in 1970 and comprises three waterproofness zones.

Featured on all Rolex divers’ watches, it is composed of around 10 components made from materials selected for their intrinsic properties: polymers for the waterproof seals, Oystersteel, precious metals and RLX titanium for the mechanical and aesthetic parts.

Screwed to the case for perfect waterproofness, the Triplock crown is recognizable by its three raised symbols under the Rolex emblem on the front. The Chromalight display gives the Sea‑Dweller optimal legibility in any circumstances. The luminescent material used is a brilliant white in daylight and emits an intense blue glow in the dark. The performance of this luminescent material clearly exceeds the standards required by watchmaking norms.