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

Reference 278344RBR occupies the upper register of the Datejust 31 range, combining White Rolesor construction — steel and 18k white gold — with a domed 24-diamond bezel and a pink index dial that provides a deliberate chromatic contrast to the cool metal tones of the case and bezel. The "RBR" suffix in the reference indicates the factory-set diamond bezel, distinguishing this variant from non-gem-set counterparts within the same dial and bracelet family.

The Calibre 2236 movement drives this reference, bringing the Syloxi silicon hairspring and a 55-hour power reserve to the 31 mm Oyster case. White Rolesor distributes 18k white gold across the crown guards, lugs, and outer Jubilee bracelet links, while Oystersteel forms the core structural components. The domed diamond bezel — set with 24 brilliant-cut diamonds in a continuous channel — adds depth and curvature to the profile, distinguishing it visually from the flat fluted or smooth bezels available elsewhere in the range. The pink index dial introduces warmth into what would otherwise be a cool, high-contrast composition.

Collectors drawn to 278344RBR tend to prioritise the RBR diamond bezel as the defining specification, treating it as the primary investment in gem-set character. The pink dial adds a layer of individuality that separates this reference from the more neutral white or silver dial options. As a current-production piece with factory diamond elements, it holds its value well when offered with complete documentation.