At 31 mm, this Datejust 31 wears the classic round Oyster case in Everose Rolesor, a combination of Oystersteel and Everose gold. The domed bezel frames a rosé-colour dial, while a scratch-resistant sapphire crystal with a Cyclops lens magnifies the instantaneous date display. A screw-down winding crown with Rolex's Twinlock double waterproofness system and a solid case back complete the case, rated waterproof to 100 metres / 330 feet.
Power comes from Calibre 2236, a perpetual, mechanical, self-winding movement from Manufacture Rolex. It features a Syloxi silicon hairspring with patented geometry, Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, and a power reserve of approximately 55 hours. Precision is rated at -2/+2 seconds per day after casing, and the calibre is COSC certified.
The watch rides on a Jubilee bracelet of five-piece links, also crafted in Everose Rolesor, and fastens with a concealed folding Crownclasp. Functions include centre hour, minute, and seconds hands, a rapid-setting instantaneous date, and stop-seconds for precise time adjustment.
