Helium Escape Valve
The Rolex Deepsea’s Oyster case is equipped with a helium escape valve. Patented by Rolex in 1967, this safety valve acts as a miniature decompression chamber for the watch and is essential for deep-sea saturation diving. During the decompression phases that professional divers undergo in hyperbaric chambers, the helium valve automatically regulates the excess pressure trapped inside the watchcase without compromising the waterproofness of the watch.
Cerachrom Bezel Insert
The unidirectional rotatable bezel of the Rolex Deepsea is fitted with a 60-minute graduated black Cerachrom insert that allows divers to safely monitor their time underwater and their decompression stops. The insert, made of an extremely hard and corrosion-resistant ceramic, is virtually scratchproof and its colour never fades. The numerals and the graduations are engraved in the ceramic and coated with platinum using a PVD (Physical Vapour Deposition) process patented by Rolex, for optimal legibility and durability. The bezel’s knurled edge offers excellent grip when setting dive time, even with diving gloves.
Safety Clasp And Extension System
The Rolex Deepsea’s Oyster bracelet is equipped with an Oysterlock safety clasp that prevents accidental opening, and with a double extension system that allows the watch to be worn comfortably over a diving suit up to 7 mm thick. The Fliplock extension link extends the bracelet by 26 mm, while the Rolex Glidelock system allows fine adjustments of the bracelet length in 2 mm increments for a total of approximately 20 mm. Neither of them requires the use of any tools.
Rolex Calibre 3135
The Rolex Deepsea is powered by calibre 3135, a self-winding mechanical movement entirely developed and manufactured by Rolex. Like all Rolex Perpetual movements the 3135 is a certified Swiss chronometer, tested by the Swiss Official Chronometer Testing Institute (COSC).
The oscillator has a large balance wheel with variable inertia regulated extremely precisely with gold Microstella nuts. It is held firmly in place by a height-adjustable traversing bridge enabling very stable positioning to increase shock resistance. The oscillator features a blue Parachrom hairspring patented and manufactured by Rolex in an exclusive alloy. Insensitive to magnetic fields, the Parachrom hairspring offers great stability when exposed to temperature variations and remains up to 10 times more precise than a traditional hairspring in case of shocks. It has a Breguet overcoil, enhancing the isochronism of the oscillations in all positions. Calibre 3135 is fitted with a self-winding module featuring a Perpetual rotor, which ensures continuous winding of the mainspring by harnessing the movements of the wrist to provide a constant source of energy.