Rolex Datejust 31 mm

Rolex Datejust 31 mm, reference 278240-0016, comes in a 31 mm steel case with a domed bezel. The case is fitted with a screw-down crown and a scratch-resistant sapphire crystal with a Cyclops lens over the date. Inside is the calibre 2236, a perpetual, self-winding mechanical movement with a power reserve of about 55 hours, certified as a chronometer. The dark grey dial has a central seconds hand and a date display. This is a women's dress watch built on the Datejust's Oyster architecture. It is paired with a steel bracelet closed by a concealed folding Crownclasp. The screw-down crown backs up a case rated to 100 metres of water resistance.