Rolex Datejust 31 White Rolesor — 24-Diamond Bezel Dark Grey Roman Dial | Ref. 278344RBR

Introduced in 2020, reference 278344RBR represents one of the most jewel-forward expressions of the contemporary Datejust 31 catalogue. White Rolesor — the union of Oystersteel with 18ct white gold — gives the 31 mm Oyster case a cool, platinum-like luminosity, while the domed bezel set with 24 brilliant-cut diamonds provides an unmistakable couture accent. Against this sparkling frame, the dark grey dial with its Roman numeral hour markers strikes a deliberate counterpoint: authoritative, graphic, and deeply refined. The Roman indices themselves, rendered in relief in white gold, bring a literary gravitas that distinguishes this configuration from index or diamond-dial variants.

Calibre 2236, Rolex's dedicated self-winding movement for this case family, powers the 278344RBR with a 55-hour power reserve and Superlative Chronometer accuracy of ±2 seconds per day. The movement's defining innovation is the Syloxi hairspring, a silicon-based spiral spring whose precise geometry was developed entirely in-house and whose performance characteristics — resistance to magnetism, thermal stability, and long-term consistency — make it a landmark in modern horology. The Perpetual rotor system maintains winding efficiency across the full range of wrist activity.

The Jubilee bracelet, rendered in White Rolesor to harmonise with the case, provides the comfortable, supple fit that has made it the defining bracelet choice for dressed Datejust references. The Oysterclasp with its Easylink 5 mm comfort extension accommodates minor size adjustments without tools. With box and papers, the 278344RBR presents in full collectible condition — a synthesis of diamond craft, Roman typographic elegance, and Rolex mechanical reliability.