Housed in a round 31 mm case crafted from 18 kt Everose gold, the Datejust 31 reference 278285RBR-0005 features a diamond-set bezel and scratch-resistant sapphire crystal with a Cyclops lens magnifying the date. The solid case back and screw-down Twinlock double waterproofness crown contribute to water resistance rated to 100 metres / 330 feet.
The white mother-of-pearl dial is set with diamonds mounted in 18 kt gold settings, while the 18 kt Everose gold President bracelet — defined by its semi-circular three-piece links — fastens via a concealed folding Crownclasp. Every element of the construction reflects the same warm Everose gold tone throughout.
Powering the watch is the Calibre 2236, a perpetual mechanical self-winding movement manufactured by Rolex. It incorporates a Syloxi silicon hairspring with patented geometry, high-performance Paraflex shock absorbers, and bidirectional winding via a Perpetual rotor, delivering a precision of -2/+2 seconds per day after casing and an approximate power reserve of 55 hours. The movement carries Superlative Chronometer certification, reflecting COSC testing followed by Rolex certification after casing.
