Rolex Datejust 31 mm

The Rolex Datejust 31 mm, reference 278289RBR-0020, comes in an 18 ct white gold case measuring 31 mm across. The bezel is diamond-set, and the case pairs with a President bracelet in matching white gold, closed by a concealed folding Crownclasp. A sapphire crystal with a Cyclops lens sits over the date, protecting a dark grey dial set with diamonds. Inside is the self-winding calibre 2236, a Rolex manufacture movement certified as a chronometer, offering approximately 55 hours of power reserve. The watch shows a central seconds display and a date function, with a screw-down crown adding to its practical construction. Rolex rates this Datejust to a depth of 100 metres.