Rolex Datejust 31 mm

Rolex Datejust 31 mm, reference 278240-0002, has a 31 mm Oystersteel case with a domed bezel. The bright black dial sits under a scratch-resistant sapphire crystal with a Cyclops lens over the date. Inside is the calibre 2236, a self-winding Perpetual movement with a power reserve of approximately 55 hours, and the watch carries chronometer certification. A central seconds hand and instantaneous date round out the display, and the screw-down crown adds a further layer of protection. The case is fitted to a five-piece link Jubilee bracelet in Oystersteel, closed by a concealed folding Crownclasp. This clasp and screw-down crown work together to keep the Datejust waterproof to 100 metres.