OYSTER PERPETUAL SEA-DWELLER
Citizen of the Deep
Rolex created the Oyster Perpetual Sea-Dweller in 1967 to meet the challenge of prolonged underwater missions. 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.
Guaranteed waterproof to a depth of 610 metres (2,000 feet) when it
was launched in 1967, then to 1,220 metres (4,000 feet) from 1978, the
Sea-Dweller combines all the attributes of the modern divers’ watch.
Tested in real-life conditions as part of the Tektite programme,
initiated jointly by NASA, the US Navy and the US Government in 1969,
the Sea-Dweller was employed during the first major experiments with
underwater habitats.
In the 1960s, so-called “saturation” diving made it possible to
remain at great depths for extended periods. It consists of
housing divers in a pressurized habitat, so as to reproduce the
pressure that prevails in their underwater working environment.
This means that they need only undergo a single decompression
process, at the very end of the mission.
This process can damage the watch. Divers breathe a mix of gases
composed mainly of helium, whose extremely fine atoms can
penetrate the case. On returning to the surface, the helium
trapped inside can create a phenomenon of excess internal pressure
liable to compromise its integrity.
In order to overcome this problem, in 1967 Rolex introduced the Sea-Dweller, a divers’ watch with a helium escape valve. It is screwed to the case and consists of a hermetic cylinder, a piston, a gasket and a spring, acting as a safety valve. When the internal pressure in the case is too high, it opens automatically, allowing the helium atoms to escape.
The Chromalight display, exclusive to Rolex, gives the Sea-Dweller optimal legibility in any circumstances. The hour markers, hands, capsule and bezel are filled or covered by hand with a luminescent material that emits an intense blue glow in the dark that lasts up to two times longer than traditional phosphorescent materials.
The Sea-Dweller is equipped with a Triplock winding crown. This screw-down crown was invented in 1970 and comprises three waterproofness zones. It reinforces the impermeability of the Sea-Dweller’s 43 mm Oyster case, whose middle case is crafted from a solid block of Oystersteel, a particularly corrosion-resistant alloy.
Explorers and oceanographers, like Sylvia Earle, and underwater
photographers, such as David Doubilet, are committed to preserving
the ocean and know that it is our most precious resource. They
wear a Sea-Dweller to reflect their passion and commitment.
Rolex has also partnered with Comex (Compagnie Maritime
d’Expertises) since 1971. For several decades, the Sea-Dweller has
equipped the divers of this French company, which specializes in
underwater engineering, technology and intervention.
As an Official Retailer, we are the only retailers allowed to sell Rolex watches. With the necessary skills and technical know-how, we will help you make the choice of a lifetime.