Rolex Datejust 31 mm

Rolex Datejust 31 mm, reference 278243-0016, in steel and gold, is a chronometer measuring 31 mm across. The case has a domed bezel and holds a sapphire crystal with a Cyclops lens over the date. Inside is the self-winding calibre 2236, a perpetual mechanical movement with a power reserve of approximately 55 hours. The olive green dial is set with diamonds, and the date sits at the centre alongside the running seconds. A screw-down crown seals the case. The watch is fitted on a steel and gold bracelet with a concealed folding Crownclasp. Water resistance reaches 100 metres.