Rolex Datejust 31 mm

Rolex Datejust 31 mm, reference 278243-0018, measures 31 mm across in steel and yellow gold. The domed bezel tops a case built around a monobloc middle and screw-down winding crown. A scratch-resistant sapphire crystal with a Cyclops lens sits over the date, and the dark grey dial is set with diamonds. Inside is the self-winding calibre 2236, a chronometer-certified movement with a power reserve of approximately 55 hours. Central seconds and an instantaneous date round out the functions. The case is fitted to a Jubilee bracelet in matching steel and gold, closed by a concealed folding Crownclasp. Rolex rates the case to 100 metres.