At 31 mm, this Datejust 31 wears the classic round Oyster case in Everose Rolesor, the signature combination of Oystersteel and Everose gold. The architecture follows Rolex's Oyster construction: a monobloc middle case, solid screw-down case back, and a screw-down Twinlock winding crown that keeps the watch waterproof to 100 metres / 330 feet. A scratch-resistant sapphire crystal with a Cyclops lens magnifies the date window, while the domed bezel is fully set with diamonds.
The rosé dial is complemented by the five-piece-link Jubilee bracelet, also rendered in Everose Rolesor and secured by a concealed folding Crownclasp. Inside beats the Calibre 2236, a perpetual mechanical self-winding movement made by Rolex, featuring a Syloxi silicon hairspring with patented geometry and Paraflex shock absorbers. It delivers a precision of -2/+2 seconds per day after casing, a power reserve of approximately 55 hours, and carries Superlative Chronometer certification — COSC-tested and then further certified by Rolex after casing.
Functions include centre hour, minute, and seconds hands, an instantaneous date with rapid setting, and a stop-seconds mechanism for precise time setting. The Datejust 31 ref. 278341RBR-0010 brings together the date complication, a diamond-adorned bezel, and the enduring two-tone Everose Rolesor combination in a 31 mm package.
