Rolex Datejust 31 Rolesor — Mint Green Index Dial, 24-Diamond Bezel | Ref. 278344RBR

Reference 278344RBR sits at the intersection of Rolex's jewellery-watch and sports-watch traditions: a 31 mm Datejust in White Rolesor — the brand's term for the combination of Oystersteel and 18 kt white gold — featuring a domed bezel set with 24 diamonds and a mint green dial with applied index hour markers. Mint green emerged as one of the most desirable Datejust dial colours of the 2020s, its fresh, pale hue striking an unusual balance between legible sportiness and refined elegance. The suffix 'RBR' in the reference designates the diamond-set bezel, confirming this as a factory-jewelled configuration.

The 31 mm Datejust houses Rolex's Calibre 2236, introduced in 2015 and developed entirely in-house with a silicon Syloxi hairspring that provides magnetic resistance and improved shock performance. The movement achieves COSC chronometer certification and delivers a 55-hour power reserve — exceptional for a movement of this size. The Rolesor construction blends the corrosion resistance and durability of 904L steel with white gold crown, bezel setting, and bracelet centre links, creating a two-tone hierarchy that highlights the diamond placement.

Datejust 31 references in Rolesor with diamond bezels occupy a perennial sweet spot in the pre-owned market — they appeal to buyers who want a moderately sized, versatile luxury watch that transitions from daily wear to formal occasions. The mint green dial has driven premium positioning for this configuration since its introduction, with strong secondary market demand reflecting collector enthusiasm for the colour. For buyers seeking a 31 mm Rolex that is anything but understated, ref. 278344RBR delivers both technical substance and visual impact.