At 31 mm, this Datejust 31 is built around a monobloc middle case crafted in Yellow Rolesor — Rolex's combination of Oystersteel and yellow gold — fitted with a domed bezel and a scratch-resistant sapphire crystal with a Cyclops lens positioned over the date. A screw-down case back and screw-down winding crown with the Twinlock double waterproofness system deliver water resistance to 100 metres / 330 feet.
The dark grey dial is set with diamonds in 18 kt gold settings, adding a quietly luxurious character to the face. The three-piece solid-link Oyster bracelet shares the same Yellow Rolesor construction as the case and secures with a folding Oysterclasp equipped with an Easylink 5 mm comfort extension link.
Power comes from the Calibre 2236, a perpetual mechanical self-winding movement manufactured by Rolex. It features a Syloxi silicon hairspring with patented geometry, high-performance Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, an approximately 55-hour power reserve, and a precision rating of -2/+2 seconds per day after casing. The movement carries Superlative Chronometer certification, reflecting both COSC testing and Rolex's own post-casing standards.
