Rolex Datejust 31 Gold — Diamond Bezel Rose Roman Dial | Ref. 278285RBR

Reference 278285RBR is a Datejust 31 presented in Rolex's Everose gold — the brand's proprietary 18ct rose gold alloy formulated to resist fading and tarnish over decades of wear. The diamond-set bezel frames a dial displaying rose-toned Roman numerals, creating a composition that reads warm, feminine, and confidently dressy. Among the Datejust 31 family, the RBR suffix denotes a ruby-set bezel variant in some configurations, and throughout this reference family the jewellery execution represents Rolex at its most adornment-focused.

Calibre 2236 powers the 278xxx-series Datejust 31, a movement developed by Rolex as the modern successor to the 2235 for mid-size and ladies' references. It incorporates a silicon Syloxi hairspring that resists magnetic interference and thermal variation, a 55-hour power reserve, and Rolex's proprietary Microstella regulation system. The 31 mm Oyster case in Everose gold is secured by a screw-down Twinlock crown, offering water resistance to 100 metres — a functional specification often underappreciated in jewellery-dress references of this tier.

For the collector, the 278285RBR occupies a premium segment of the Datejust family where precious-metal cases, diamond bezels, and gem-set dials converge. Everose gold references in this configuration are sought after for their perceived rarity relative to white gold equivalents, and the Roman numeral dial treatment adds a classicist quality that distinguishes it from index-dial variants. This is a strong choice for a buyer seeking a daily Datejust that skews emphatically toward jewellery rather than sport.