Rolex Lady-Datejust 28 mm

The Rolex Lady-Datejust 28 mm, reference 279173-0019, has a 28 mm case in steel and gold. The fluted bezel is finished in gold, a detail carried over from the earlier screw-down design of the Oyster case. A sapphire crystal with a Cyclops lens sits over the date, above a silver dial. Inside is the self-winding calibre 2236, a manufacture movement offering approximately 55 hours of power reserve. As a chronometer, it carries Rolex's own certification for accuracy after casing. The screw-down crown and case work together with a five-piece Jubilee bracelet in matching steel and gold, closed by a concealed folding Crownclasp. Rolex rates the case to 100 metres.