At 31 mm, this Datejust 31 is built around a round White Rolesor case — Rolex's combination of Oystersteel and white gold — featuring a monobloc middle case, solid case back, and a screw-down winding crown with Twinlock double waterproofness, rated to 100 metres. The domed bezel is set with diamonds, while the scratch-resistant sapphire crystal carries a Cyclops lens positioned directly over the date window.
The silver dial is itself set with diamonds held in 18 kt gold settings, lending the piece an unmistakable brilliance. Beneath it runs the Calibre 2236, a perpetual mechanical self-winding movement bearing Manufacture Rolex provenance. It offers a precision rating of -2/+2 seconds per day after casing, a Syloxi silicon hairspring with patented geometry, high-performance Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, and approximately 55 hours of power reserve. Functions include centre hour, minute, and seconds hands, instantaneous date with rapid setting, and stop-seconds for precise time adjustment.
The Oyster bracelet in Oystersteel is composed of three-piece solid links and fastens with a folding Oysterclasp fitted with an Easylink 5 mm comfort extension link. This reference is COSC certified and carries the date complication as its sole additional function, keeping the presentation clean and focused.
