< Back OYSTER PERPETUAL SEA-DWELLER: CITIZEN OF THE DEEP Feb 19, 2024 < Back Given Boston’s maritime heritage, the Long’s Jewelers team holds a cultural affinity towards the sea — and the Rolex Sea-Dweller is no exception. Anyone who has spent time in the New England area knows that the ocean is a vast, awe-inspiring ecosystem to explore. Aboard ocean exploration, there is incredible reliability and comfort in having a watch that remains accurate no matter what weather the North Eastern elements many provide. For Long’s customers, the Sea-Dweller is unique because of its helium escape valve that automatically opens when the internal pressure in the case is too high, allowing the helium atoms to escape. But like all things Long’s and Rolex, this divers watch has a deep history of excellence and elegance. Keep reading for the whole Sea-Dweller story. 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) in 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. The new face of diving 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, 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. Mastering decompression with the helium escape valve In order to overcome this problem, in 1967 Rolex introduced the Sea-Dweller, a diver’s 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. All-round Legibility 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. Reinforced waterproofness 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. The watch for citizens of the seas 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. Visit Long’s at one of our New England locations to experience first-hand the Oyster Perpetual Sea-Dweller. As an Official Rolex 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 that will last a lifetime. Discover the collection
