Rolex Datejust 31 mm

Rolex Datejust 31, reference 278243-0001, measures 31 mm in steel and gold. The case has a domed bezel and a monobloc middle construction with a screw-down winding crown. A sapphire crystal covers the white dial, with a Cyclops lens set over the date. Inside is the self-winding calibre 2236, a Rolex manufacture movement with a Syloxi hairspring and a power reserve of about 55 hours, certified as a chronometer. The dial shows a central seconds hand and a date display. The steel and gold bracelet closes with a folding Oysterclasp fitted with the Easylink comfort extension link. The screw-down crown helps hold the case to its 100 metre water resistance rating.