Measuring 31 mm across, the Oyster case is constructed with a monobloc middle case, screw-down case back, and a screw-down Twinlock winding crown, together providing water resistance to 100 metres / 330 feet. The scratch-resistant sapphire crystal features a Cyclops lens positioned over the date window for effortless legibility.
At the heart of the watch sits Rolex Calibre 2236, a perpetual, mechanical, self-winding movement bearing Manufacture Rolex origins. It offers a power reserve of approximately 55 hours, bidirectional winding via a Perpetual rotor, and a Syloxi silicon hairspring with patented geometry paired with Paraflex shock absorbers. The movement carries Superlative Chronometer certification — reflecting both COSC standards and Rolex's own post-casing verification — delivering precision of -2/+2 seconds per day. Functions include centre hour, minute, and seconds hands, instantaneous date with rapid setting, and stop-seconds for precise time setting.
The Jubilee bracelet, rendered in the same Yellow Rolesor combination, features five-piece links and fastens with a concealed folding Crownclasp. Together with the diamond-adorned dial and bezel, this Datejust 31 presents a thoroughly jewel-forward interpretation of one of Rolex's most enduring designs.
