Measuring 31mm, this Datejust 31 is built around a White Rolesor case — Rolex's combination of Oystersteel and white gold — featuring a round Oyster architecture with a monobloc middle case, solid case back, and screw-down winding crown with Twinlock double waterproofness. The domed bezel is set with diamonds, while scratch-resistant sapphire crystal with a Cyclops lens over the date window keeps things legible and protected to 100 metres of water resistance.
The silver dial features a Chromalight display offering long-lasting blue luminescence for readability in low light. Beneath the solid case back, the Calibre 2236 — a perpetual, mechanical, self-winding movement from Manufacture Rolex — delivers a precision of -2/+2 seconds per day after casing, a power reserve of approximately 55 hours, and a Syloxi silicon hairspring with patented geometry alongside Paraflex shock absorbers. An instantaneous date with rapid setting and stop-seconds function round out the complications.
The Oystersteel Jubilee bracelet, composed of five-piece links, closes with a concealed folding Crownclasp for a secure and refined fit. Reference 278344RBR-0014 is COSC certified.
