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

Bearing the RBR suffix that signals a diamond-set bezel, Reference 278344RBR elevates the Datejust 31 into the realm of jewellery watchmaking without sacrificing any of the series' celebrated technical discipline. White Rolesor — Rolex's pairing of Oystersteel with 18 ct white gold — provides a cool, contemporary backdrop for the domed bezel set with 24 brilliant-cut diamonds, while the white dial with Roman numerals maintains classical legibility at the heart of the composition.

The Calibre 2236 movement at this reference's core is a manufacture achievement: developed entirely by Rolex, it features the brand's proprietary Syloxi silicon hairspring — a component that replaced traditional Nivarox alloys to achieve greater magnetic resistance and dimensional stability. Operating at 28,800 vibrations per hour, the movement is chronometer-certified and regulated to better than +2/−2 seconds per day after final adjustment at the manufacture. The Cyclops date lens, a Datejust hallmark since 1953, sits precisely at 3 o'clock.

The RBR designation distinguishes this reference for collectors who appreciate the intersection of gem-setting artistry and watchmaking precision. Each diamond in the bezel is individually selected by Rolex gemmologists to ensure colour and clarity consistency, and the domed geometry of the setting adds three-dimensional presence to the wrist. Presented on Rolex's jubilee bracelet, the 278344RBR is an instrument of both timekeeping and personal adornment — a combination the Datejust has embodied for eight decades.