Rolex Datejust 31 mm

The Rolex Datejust 31 mm, reference 278240-0001, is a women's watch in steel measuring 31 mm across. The case has a domed bezel and a screw-down winding crown. A Cyclops lens sits over the date on the scratch-resistant sapphire crystal, magnifying it above the bright black lacquered dial. The self-winding movement is calibre 2236, a Rolex manufacture chronometer with a power reserve of approximately 55 hours. Central seconds and an instantaneous date round out the functions. The watch is fitted to a steel Oyster bracelet with a folding Oysterclasp, which includes an Easylink comfort extension link for added comfort. Rolex rates the case to 100 metres of water resistance.