Rolex Datejust 31 mm

The Rolex Datejust 31, reference 278289RBR-0007, has a 31 mm case in 18 ct white gold. The case is fitted with a diamond-set bezel and a screw-down winding crown. A scratch-resistant sapphire crystal covers the white dial, with the Cyclops lens magnifying the date. Inside runs the calibre 2236, a self-winding mechanical movement with a Syloxi hairspring and a power reserve of approximately 55 hours; Rolex certifies it as a Superlative Chronometer. The watch is set with diamonds and carries a central seconds display alongside the date function. It comes on a President bracelet in white gold with a concealed folding Crownclasp. Rolex rates the case to 100 metres.