Rolex Datejust 31 mm

The Rolex Datejust 31 mm, reference 278278-0034, is a women's watch cased in 18 ct yellow gold. The case is fitted with a fluted bezel, another Rolex hallmark, and a scratch-resistant sapphire crystal with a Cyclops lens over the date. The silver dial is set with diamonds, applied in 18 ct gold settings, and the watch is a chronometer, certified to Rolex's own Superlative standard. Inside is calibre 2236, a self-winding mechanical movement with a power reserve of approximately 55 hours. The screw-down crown protects the movement and adds to the case's overall solidity. A President bracelet in matching yellow gold closes with a concealed folding Crownclasp. The case is waterproof to 100 metres.