Rolex Datejust 31 White Rolesor — 24 Diamond Bezel White Mother-Of-Pearl Diamond Dial | Ref. 278344RBR

Reference 278344RBR stands among the most visually refined configurations in the Datejust 31 line: a White Rolesor case featuring the domed diamond bezel set with 24 brilliant-cut stones, a white mother-of-pearl dial adorned with diamond hour markers, and the luminous architectural coherence that only arises when white gold, steel, shell, and gemstones are combined with Rolex's exacting lapidary precision. The result is a watch that approaches jewellery in its material richness while remaining entirely driven by horological intent.

Calibration is provided by Calibre 2236, Rolex's self-winding movement designed exclusively for 31 mm references and equipped with the patented silicon Syloxi hairspring. This component eliminates the Anachron device required by traditional alloy springs, simplifying the movement architecture while enhancing antimagnetic and thermal stability. COSC certification to -2/+2 seconds per day and a 55-hour power reserve are paired with 100 m Oyster case water resistance — the full suite of Rolex mechanical guarantees in a 31 mm gem-set case.

The domed diamond bezel of the RBR configuration — a 24-stone pavé arrangement — is a significant technical achievement in its own right, demanding extraordinary precision in stone selection and setting to maintain the curvature of the bezel profile. Combined with a mother-of-pearl dial, a material whose optical properties shift with ambient light, this reference delivers a uniquely dynamic aesthetic that changes throughout the day. Among gem-set mid-size Rolex pieces, the 278344RBR represents a high-water mark of the current generation's ambitions in precious materials.