Rolex Datejust 31 Everose Rolesor — 46-Diamond Bezel Silver Diamond Dial | Ref. 278381RBR

Reference 278381RBR presents the Datejust 31 in Everose Rolesor — a proprietary combination of Oystersteel and Rolex's exclusive 18ct Everose gold, an alloy whose rose hue is formulated to resist fading over decades of wear. The 46-diamond bezel channels light through each precisely channel-set brilliant, creating a continuous luminous perimeter around the case that defines the watch's jewellery-forward character. Against this warm rose gold and diamond surround, the silver dial carries its own diamond hour markers — stones set flush and matched for brilliance — resulting in a fully integrated composition where precious material and precious stone converge in total visual coherence. The 'RBR' suffix in the reference number denotes the factory ruby and diamond configuration present on this model.

The Calibre 2236 manufacture movement, reserved for Rolex's 31mm references in the 278xxx series, advances the technical pedigree of this reference significantly beyond earlier Datejust 31 generations. Its signature feature is the Syloxi silicon hairspring, whose thermoelastic properties dramatically improve chronometric stability across temperature ranges — a meaningful advancement over the Nivarox alloys used in predecessor calibres. The movement achieves COSC chronometer certification with a 55-hour power reserve and operates at 28,800 vph for smooth seconds hand motion.

Within the contemporary Datejust 31 collection, Everose Rolesor references with full diamond bezels and diamond dials represent the apex of decorative ambition — pieces that blur the boundary between instrument watch and fine jewel. The 278xxx series is the current-generation reference, endowing 278381RBR examples with the most advanced movement and finishing standards Rolex currently offers. Factory diamond and gemstone references consistently command premium positioning in the secondary market, where buyers prize the assurance of Rolex's own gem-setting expertise and quality control.