Rolex Datejust 31 Ref. 278384RBR-0031 Dark Grey Diamond Dial White Rolesor Oyster Watch

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Measuring 31 mm across, the round case is constructed in White Rolesor, blending Oystersteel with white gold in a monobloc middle case architecture finished with a solid screw-down case back and a screw-down Twinlock winding crown. The diamond-set bezel frames a scratch-resistant sapphire crystal fitted with a Cyclops lens over the date aperture, while the case maintains waterproofness to 100 metres / 330 feet.

The dark grey dial carries Roman numeral hour markers with the large VI set with 11 diamonds, and the remaining numerals are also set with diamonds, lending a measured brilliance across the face. An instantaneous date display with rapid setting and stop-seconds for precise time setting round out the dial's functionality.

Power comes from the Calibre 2236, a perpetual mechanical self-winding movement produced by Rolex, featuring a Syloxi silicon hairspring with patented geometry and Paraflex shock absorbers. Bidirectional winding via the Perpetual rotor delivers approximately 55 hours of power reserve, with precision rated at -2/+2 seconds per day after casing. The Oyster bracelet is composed of three-piece solid links in Oystersteel, secured by a folding Oysterclasp with an Easylink 5 mm comfort extension link.

Brand Rolex
Model Datejust
Reference 278384RBR-0031
Case diameter 31 MM
Caliber 2236, Manufacture Rolex
Power reserve Approximately 55 hours
Water resistance Waterproof to 100 metres / 330 feet
Glass Scratch-resistant sapphire, Cyclops lens over the date
Clasp type Folding Oysterclasp with Easylink 5 mm comfort extension link
Dial Dark Grey

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