Housed in a 31mm 18kt white gold Oyster case, this Datejust 31 (reference 278289RBR-0016) features a monobloc middle case construction with a screw-down case back and screw-down winding crown utilizing the Twinlock double waterproofness system. The bezel is set with diamonds, while scratch-resistant sapphire crystal with a Cyclops lens over the date completes the case. Water resistance is rated to 100 metres / 330 feet.
The pink dial is appointed with Roman numeral hour markers, lending the piece a classic, legible character. The watch rides on an 18kt white gold President bracelet composed of semi-circular three-piece links, secured by a concealed folding Crownclasp.
Powering the watch is the Calibre 2236, a perpetual mechanical self-winding movement manufactured by Rolex. It offers a precision rating of -2/+2 seconds per day after casing, a Syloxi silicon hairspring with patented geometry, Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, and approximately 55 hours of power reserve. The movement carries Superlative Chronometer certification, reflecting both COSC and Rolex's own post-casing standards.
