Rolex Datejust 31 mm

The Rolex Datejust 31 mm, reference 278274-0010, comes in a steel and white gold case measuring 31 mm across. The fluted bezel sits above a screw-down crown, and the case carries a scratch-resistant sapphire crystal with a Cyclops lens over the date. Inside is the calibre 2236, a perpetual, self-winding mechanical movement with a power reserve of around 55 hours. The white dial is certified to Rolex's Superlative Chronometer standard, and the date function is set for instant, rapid adjustment. A steel Jubilee bracelet closes with a concealed folding Crownclasp in steel and gold. The screw-down crown holds the case to its 100 metre water resistance rating.