Rolex Datejust 31 mm

The Rolex Datejust 31 mm, reference 278288RBR-0006, comes in 18 ct yellow gold and measures 31 mm across. The case follows Rolex's Oyster architecture with a monobloc middle case and screw-down winding crown, and the dial sits beneath a scratch-resistant sapphire crystal with a Cyclops lens over the date. The bezel is diamond-set, and the white mother-of-pearl dial is set with diamonds as well. Inside is the calibre 2236, a self-winding mechanical movement with a power reserve of about 55 hours, certified as a Superlative Chronometer. The watch is a chronometer with central seconds and date functions. It is fitted with a President bracelet in yellow gold, closed by a concealed folding Crownclasp. The case is waterproof to 100 metres.