The Rolex Oyster Perpetual Date Sea-Dweller is a line of diver's watches manufactured by Rolex, with an underwater diving depth rating of 1,220 meters (4 000 ft) and up to 3,900 metres (12,800 ft) for the Sea-Dweller Deepsea variant. In 2022 the dimensionally large Deepsea Challenge Sea-Dweller variant with an official depth rating of 11,000 metres (36,090 ft) was added to the line. The Rolex Sea-Dweller is part of Rolex's Professional line.
Launched in 1967 with a depth rating of 610 metres (2,000 ft), the first Sea-Dweller available to the public featured a gas escape valve, developed by the brand specifically for saturation diving, which allows the helium trapped in the watch while decompressing to be released at a given pressure during decompression, while preserving the watch case's water resistance. Since 2019 Sea-Dweller models are available in steel or steel and yellow gold, and have a 43 mm case.[1][2]
The Deepsea models come equipped with the brand's patented Ringlock system, which was designed to provide a higher degree of pressure resistance.