Rolex Datejust 31 mm

The Rolex Datejust 31 mm, reference 278274-0009, comes in a 31 mm case of steel and white gold. The fluted bezel, also in gold, sits above a white dial with a Cyclops lens over the date. A sapphire crystal covers the dial, and the screw-down crown feeds the case's waterproofness system. Inside is the calibre 2236, a self-winding movement with a Syloxi silicon hairspring and a power reserve of approximately 55 hours; Rolex certifies it as a chronometer. The date sits alongside a central seconds hand. The watch is fitted to a steel Oyster bracelet with a folding Oysterclasp that includes the Easylink comfort extension link. Waterproofing is rated to 100 metres.