Rolex played a pioneering role in the development of special ceramics for creating monobloc bezels and monobloc bezel inserts. Not only are these new materials extremely corrosion-resistant and virtually scratchproof, their colours are also of a rare intensity and unaffected by ultraviolet rays. On the new version of the Sea-Dweller, the unidirectional rotatable bezel is fitted with a 60-minute graduated cerachrom insert in black ceramic that allows divers to safely monitor their dive and decompression times. The moulded, recessed graduations and numerals are coated with yellow gold via PVD (physical vapour deposition). the bezel’s knurled edge offers excellent grip, to comfortably set dive time even when wearing gloves.
The robust 44 mm case in Oystersteel, thick domed sapphire crystal and unidirectional rotatable bezel with a 60-minute graduated black Cerachrom insert exude the purposeful character of the Rolex Deepsea. It is the uncompromising divers’ watch, built for the most demanding underwater missions.
In 2014 Rolex announced the release of the Rolex Deepsea D-blue Dial, commemorating James Cameron’s historic solo dive to the bottom of the Mariana Trench, some 11,000 metres deep. From twilight blue to bottomless black, its two-colour gradient dial celebrates one man’s journey to the deepest place on Earth.
Before they return to the open air, professional divers heading for the surface after a deep saturation dive must spend time in a decompression chamber, where they breathe a gas mixture containing helium. The tiny molecules of helium, an extremely light gas, infiltrate into the watch. During decompression, the helium is unable to escape from the waterproof case quickly enough, creating a pressure differential that could force the crystal out of the watch case. Rolex engineers created a gas escape valve fitted with a spring: it opens when the difference in pressure between the inside and outside of the watch reaches 3 to 5 bars, allowing the helium to escape, thereby protecting the watch.
The patented Rolex Glidelock extension system allows divers to adjust the length of the bracelet for a secure and comfortable fit over a diving suit, without using any tools. A robust toothed panel under the clasp cover provides an extension of up to 20 mm in 2 mm increments.