Rolex Datejust 31 mm

Rolex Datejust 31 mm, reference 278273-0030, measures 31 mm across in steel and gold. The case follows the Oyster architecture, with a monobloc middle case and screw-down winding crown, and carries a fluted bezel in gold. A sapphire crystal with a Cyclops lens sits over the date, and the olive green dial is set with diamonds. Inside runs the self-winding calibre 2236, a chronometer movement with roughly 55 hours of power reserve. Central seconds and date round out the functions, both fitted with a screw-down crown for added security. The watch is set on a steel and gold bracelet with a concealed folding Crownclasp. Rolex rates the case to 100 metres.