Rolex Datejust 31 White Rolesor — Mint Green Index Dial | Ref. 278240

The Datejust 31 in White Rolesor — a combination of 904L Oystersteel and 18ct white gold — presents one of the collection's most quietly sophisticated colour stories in this mint green dial variant. Mint green occupies a chromatic territory between the neutral and the spirited: sufficiently muted to pair with formal attire yet distinctive enough to reward the discerning eye. Against the white gold domed bezel and the cool tones of the steel and white gold case, the dial achieves a fresh, almost botanical luminosity that distinguishes this specification within the broader Datejust 31 family.

The Calibre 2236, housed within, represents Rolex's purpose-built movement for the Datejust 31 size — the first new calibre the manufacture developed specifically for this case diameter. Its Syloxi silicon hairspring, produced in Rolex's own micromechanical workshop, eliminates the sensitivity to magnetic fields and humidity that constrains traditional alloy hairsprings, while the COSC-certified precision places it among the most accurate movements in its class. A power reserve of approximately 55 hours ensures continuous function through extended periods without wrist activity.

The Jubilee bracelet in Oystersteel, with its distinctive five-piece link architecture and concealed folding Crownclasp, provides the elegant wrist presence that has defined the Datejust aesthetic since the bracelet's introduction in 1945. Reference 278240 carries particular appeal for collectors seeking the current-generation 31mm specification — updated case proportions, the 2236 movement, and a dial colour that has achieved considerable recognition since the model's 2020 release. Water resistance stands at 100 metres.