Rolex Datejust 31 White Rolesor — Dark Grey Diamond Dial | Ref. 278384RBR

Reference 278384RBR belongs to the current-generation Datejust 31, introduced as part of Rolex's 2016 lineup refresh. White Rolesor — the pairing of Oystersteel with 18ct white gold — gives the case and Jubilee bracelet a cooler, more contemporary tone than yellow Rolesor, while keeping the watch accessible relative to a full white gold reference. The diamond-set bezel and dark grey diamond dial create a dramatic tonal contrast that photographs exceptionally well under varied lighting conditions.

Calibre 2236 drives this reference, featuring the proprietary Syloxi silicon hairspring and a bidirectional Perpetual rotor delivering approximately 55 hours of power reserve. The 31 mm Oyster case is constructed to Rolex's full waterproofing standards — triple-locked crown, screw-down case back, and 100-metre water resistance — meaning the decorative appointments do not come at any functional compromise. Diamond-set lugs on the Jubilee bracelet extend the stone setting from dial to wrist, creating an integrated jewellery effect.

For collectors, the RBR suffix denotes the factory diamond bezel configuration, and current-generation 278xxx references are among the more sought-after mid-size Rolexes precisely because the updated case geometry improved wearability noticeably over the prior 178xxx generation. Dark grey dials in particular are a slower-turning variant, making this a strong candidate for those building a considered collection rather than purchasing purely for short-term flipping.