Rolex Datejust Gold — White Roman Dial, Diamond Bezel | Ref. 278285RBR

The reference 278285RBR Datejust 31 in 18 ct gold marks the current generation of Rolex's intermediate-size Datejust, the 278xxx series that superseded the 178xxx references and brought with it material upgrades in both case design and movement. The all-gold Oyster case — polished and brushed surfaces alternating across the lugs and flanks — conveys a confident opulence, amplified by a factory diamond bezel whose individual stones are matched and set to Rolex's highest gem standards. The White Roman dial, rendered in Rolex's crisp lacquer with applied gold Roman numerals, provides an elegant counterpoint to the warm gold surrounding it, ensuring immediate legibility against the jewellery-rich case.

Calibre 2236, introduced with the 278xxx generation, is the technical engine that distinguishes these references from their predecessors. Where the 178xxx series relied on the 2235, the 278xxx advances to the 2236's Syloxi silicon hairspring — a paramagnetic component manufactured entirely in-house from a monocrystalline silicon wafer through a deep-reactive ion etching process. The result is a hairspring immune to magnetic interference, more consistent across temperature extremes and substantially more shock-resistant. The 2236 achieves a 55-hour power reserve and is certified Superlative Chronometer.

In the collector market, the 278xxx Datejust 31 in yellow gold with a diamond bezel represents the contemporary apex of a mid-size format with roots extending to the original 1945 Datejust. Roman numeral dials have a long association with Rolex's most formal configurations, and the White Roman execution provides the legibility prized by daily wearers alongside the prestige demanded by occasions calling for serious jewellery. The current-generation movement and case ensure this reference will remain relevant and desirable across market cycles.