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It also houses a self-winding module via its perpetual rotor and offers approximately 55 hours of power. The movement is fitted with a paramagnetic nickel-phosphorus escape wheel, while the movement’s oscillator features the Rolex-designed, patented, paraflex shock absorbers, to help increase the movement’s shock resistance. Since silicon is affected by temperature change, this process covers the hairspring in an oxide layer, “rendering it thermo-compensating.” Its patented geometry ensures the caliber’s regularity in any position, compensating for the hairspring’s gravitational errors due to the varying pitch and thickness of the hairspring. The hairspring, made from silicon and silicon oxide, was created in-house using deep reactive ion etching (DRIE). The self-winding mechanical movement, Caliber 2236, is fitted with a syloxi hairspring (a silicon hairspring introduced in the 2014 Datejust Pearlmaster 43), patented and produced by the brand, which according to Rolex can remain up to 10 times more precise than a traditional hairspring in case of shocks. The new Datejust 31 models come equipped with a movement developed and manufactured by Rolex. It has been a signature feature of the brand since 1933. Rolesor is the combination of 18k gold and Oystersteel. The screw-down caseback edged with subtle fluting, an element first introduced on an Oyster model in 1926, has been fastened with a unique tool that allows only Rolex watchmakers access to the movement. Protecting the case and the dial is a scratchproof sapphire crystal fitted with a Cyclops lens over the date display window at 3 o’clock. The watch boasts Rolex’s Twinlock double water-resistance system, in which the winding crown screws down securely against the case. The case middle is crafted from a block of Oystersteel, an alloy from the 904L steel family typically used in the aerospace industry for its anti-corrosion properties similar to those of precious metals. According to Rolex, it has guaranteed water resistance to a depth of 100 meters (330 feet). The new Datejust 31 case measures 31 mm in diameter. The crystal is made of “scratch-proof” sapphire and is fitted with a Cyclops lens at 3 o’clock for easy reading of the date. Each model’s hands, index hour markers, and Roman numerals are crafted in 18k white gold.
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The three others, with fluted bezels in white gold, feature a mint green-colored, sunray-finish dial a white-colored lacquer dial and a dark grey-colored, sunray-finish dial. The first timepiece features a bezel set with 46 brilliant-cut diamonds and has an aubergine, sunray-finish dial adorned with a diamond-set Roman “VI” numeral at 6 o’clock. Rolex’s Datejust is the archetype of the classic watch thanks to functions and aesthetics. Here is everything you need to know about Rolex’s new Oyster Datejust 31 models.
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