Rolex Datejust 31 mm

Rolex Datejust 31, reference 278289RBR-0018, measures 31 mm in white gold. The case follows Rolex's Oyster architecture with a monobloc middle case and screw-down winding crown, and the dial sits under a scratch-resistant sapphire crystal with a Cyclops lens over the date. The pink dial is set with diamonds, and the bezel carries the same diamond-set treatment. Inside is the calibre 2236, a self-winding mechanical movement with a Syloxi hairspring and a power reserve of approximately 55 hours; Rolex certifies it as a Superlative Chronometer. The watch keeps central seconds and a date function, and the crown screws down for added security. A President bracelet in white gold, closed with a concealed folding Crownclasp, completes the piece. Rolex rates the case to 100 metres.