The Watch of the Deep: Oyster Perpetual Sea-Dweller

This year Rolex introduced an Oyster Perpetual Sea-Dweller in a yellow Rolesor version, combining Oystersteel and yellow gold. This new watch brings yellow gold to the Sea-Dweller range for the first time.
The Sea-Dweller was designed in collaboration with the pioneers of professional deep-sea diving, who spent extended periods underwater. This ultra-resistant tool watch accompanied the first experimental underwater habitat programmes. It played a vital role in conquering the ocean depths thanks to the Oyster case and the helium escape valve.

A paragon of robustness and reliability, Oyster case of the Sea-Dweller is guaranteed waterproof to a depth of 1,220 metres. Its middle is crafted from a solid block of particularly corrosions-resistant Steel. The case back is hermetically screwed down and the winding crown, fitted with the Triplock triple waterproofness system, screws down securely against the case.
Rolesor, the combination of gold and steel on a Rolex watch, has been a signature feature of the brand since 1933. On the new yellow Rolesor version of the Sea-Dweller, the bezel, winding crown and centre links of the bracelet are in gold, while the case and outer links of the bracelet are in steel.

The yellow Sea-Dweller-lettering is echoing the colour of the yellow gold. When the Sea-Dweller was updated in 2017, this lettering was in red, in reference to the original model.
The crystal is made of virtually scratchproof sapphire and is fitted with a Cyclops lens at 3 o’clock for easy reading of the date.
The helium escape valve acts as a safety valve. It allows excess pressure built up in the watch case during a dive to escape during a diver’s decompression phase in a hyperbaric chamber, while preserving the waterproofness of the watch.
The light reflections on the case sides and lugs highlight the profile of the Sea-Dweller’s 43-mm Oyster case, which features a unidirectional rotable bezel with a 60-minute graduated Cerachrom insert in black ceramic. This ceramic is extremely corrosion-resistant and virtually scratchproof and the colours are unaffected by ultraviolet rays. The bezel’s knurled edge offers excellent grip, to comfortably set dive time even when wearing gloves.

The new version of the Sea-Dweller is equipped with calibre 3235, a new-generation movement. This automatic movement offers fundamental gains in terms of precision, power reserve, resistance to shocks and magnetic fields, convenience and reliability. Like all Rolex watches, the new Sea-Dweller carries the Superlative Chronometer certification, which ensures excellent performance on the wirst.
And it provides a power reserve of up to 70 hours.

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