Rolex Datejust 31 Yellow Rolesor — Dark Mother-of-Pearl Diamond Dial, Fluted Bezel | Ref. 278273

Reference 278273 in its second configuration pairs Yellow Rolesor construction with one of the most optically dynamic dial treatments available in the Datejust 31 range: a dark mother-of-pearl background set with diamond hour markers and covered by a 24-diamond-set fluted bezel. Dark mother-of-pearl — sourced from black-lipped oyster shells — displays a shifting iridescence across greens, blues, and purples depending on the angle of light, providing a natural complexity that no printed or lacquered dial can replicate. Against yellow gold case elements, the dark dial creates a rich jewellery-forward statement.

The Calibre 2236 movement at the heart of this reference brings silicon hairspring technology — Rolex's Syloxi component — into a movement designed for both precision and longevity. Running at 28,800 vph with 55 hours of power reserve, it performs to COSC chronometer certification standards while requiring less frequent servicing than traditional lever-escapement movements with lubricant-dependent parts. The Yellow Rolesor case — Oystersteel body with 18-carat yellow gold bezel, crown, and bracelet elements — delivers the warm colour contrast characteristic of this two-tone family.

Buyers of this reference are typically drawn to the convergence of natural material artistry and horological precision. The dark mother-of-pearl dial with diamonds is a high-demand configuration on the secondary market, and fully documented examples retain value particularly well. It suits a collector building a versatile wardrobe of dress watches, as the piece functions equally as casual daywear jewellery or a formal evening accessory.