Rolex Datejust 31 mm

Rolex Datejust 31 mm, reference 278384RBR-0002, cases at 31mm in steel and gold. The bezel is diamond-set, giving the case a sparkling edge against the bright black dial. A sapphire crystal with Cyclops lens sits over the date, and the screw-down crown protects the movement beneath. Inside is calibre 2236, a self-winding chronometer movement with 55 hours of power reserve and central seconds. The watch is a chronometer, certified for precision after casing. It comes on a steel bracelet fitted with a concealed folding Crownclasp. The screw-down crown, part of the Twinlock system, holds the case to its 100 metre rating.