Rolex Datejust 31 Yellow Gold — Chocolate Diamond Dial | Ref. 278285RBR

Reference 278285RBR brings together two of the most covetable dial aesthetics in current mid-size Rolex production: a chocolate sunburst background and a diamond hour-marker set. In 18ct yellow gold, the warm tonal coherence between the case metal, dial colour, and diamond settings creates a watch whose visual signature is immediately distinctive without resorting to ostentation. The diamond bezel adds a further layer of jewellery content, though it is the dial — with its interplay of deep brown and scintillating stones — that gives this reference its character.

Calibre 2236, Rolex's manufacture movement for the 28mm and 31mm families, powers the watch. Its defining technical feature is the Syloxi hairspring, a patented silicon component developed in-house that provides exceptional resistance to magnetic interference and thermal variation. The movement offers a 55-hour power reserve and is certified to Rolex's Superlative Chronometer standard, placing it among the most accurate movements available in a lady's or mid-size watch. The Oyster bracelet in 18ct yellow gold maintains water resistance to 100 metres via the Twinlock screw-down crown.

Chocolate diamond-dial Datejust references in yellow gold occupy a specific and highly desirable position in the secondary market. The combination of a warm dial color with factory diamond indices and a diamond bezel is a configuration that consistently outperforms plainer alternatives in resale velocity. Collectors who appreciate mid-size Rolex with jewellery content — and who prefer warmth over the cooler tones of white or platinum gold — find 278285RBR to be one of the most satisfying references in the current 31mm portfolio.