Rolex Datejust 31 mm

The Rolex Datejust 31, reference 278278-0038, is a women's watch with a 31 mm case in 18 ct yellow gold. The fluted bezel is executed in gold as well, a Rolex signature detail on this model. Inside is the calibre 2236, a Perpetual, mechanical, self-winding movement with a power reserve of approximately 55 hours, certified as a Superlative Chronometer. A Cyclops lens sits over the date on the scratch-resistant sapphire crystal. The black mother-of-pearl dial is set with diamonds in 18 ct gold settings, and the watch carries a screw-down crown. It is fitted on a President bracelet in yellow gold with a concealed folding Crownclasp. The screw-down crown helps hold the case to its 100 metre water resistance rating.