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

Reference 278381RBR marks the Datejust 31's transition into the current 278xxx reference series — a generational update that brought the Lady-Datejust and mid-size Datejust lines in line with Rolex's modern case architecture, updated bracelet constructions, and revised movement specifications. In Everose Rolesor — the pairing of Oystersteel with 18-carat Everose gold — and finished with a 46-diamond bezel and white dial carrying Roman numeral hour markers, this reference sits among the most fully dressed configurations in the 31 mm range without crossing into all-precious-metal territory.

The movement is the Calibre 2236, Rolex's dedicated 31 mm-class automatic featuring a silicon Syloxi hairspring for thermal and magnetic performance and a 55-hour power reserve — an improvement over the prior Calibre 2235 in both reserve duration and magnetic resistance. The Everose gold components — bezel surround, crown, and Jubilee bracelet centre links — carry the characteristic warm pink-gold tone of this Rolex proprietary alloy, which is specifically formulated to resist fading over time. The 46-diamond bezel, set with brilliant-cut stones in white gold mounts, provides maximum sparkle contrast against the Everose components beneath.

Within the Datejust 31 market, the 278381RBR occupies the premium decorated tier — more than a plain or fluted bezel variant, but accessible against all-precious-metal configurations. The Everose Rolesor and diamond bezel combination appeals to buyers who want the warmth of rose gold without the full cost of an Everose-only piece, and the white Roman dial adds legibility and classic character. Resale values are robust for near-mint examples, particularly with full original documentation, and the 278xxx series designation confirms modern movement and case specifications.