Rolex Datejust 31 mm

Rolex Datejust 31, reference 278278-0030, has a 31 mm case in yellow gold. The fluted bezel is also gold, and the case carries a sapphire crystal with a Cyclops lens over the date. The dial is olive green, set with diamonds, with the VI marked by 11 stones. Inside is the self-winding calibre 2236, a Rolex manufacture movement certified as a Superlative Chronometer with a power reserve of about 55 hours. The date function sits alongside a central seconds hand, and the crown is a screw-down type. A President bracelet in yellow gold closes with a concealed folding Crownclasp. The screw-down crown helps hold the case to its 100 metre water resistance rating.