Rolex Datejust 31 Yellow Rolesor — Olive Green Diamond Dial, Diamond Bezel | Ref. 278343

Reference 278343 is a Datejust 31 in Yellow Rolesor — Rolex's term for the combination of Oystersteel and 18 ct yellow gold — configured here with a factory diamond-set bezel and an olive green dial set with diamond hour markers. At 31 mm, this reference occupies the middle ground in the Datejust family, sized for those who prefer a refined wrist presence without the full presence of the 36 mm or 41 mm variants. The olive green dial is among the more contemporary additions to the Datejust palette, offering an earthy, chromatic richness that pairs naturally with yellow gold accents.

Inside the case runs Calibre 2236, Rolex's manufacture movement developed specifically for the brand's mid-size and ladies' Datejust models. The 2236 features a silicon Syloxi hairspring — a proprietary innovation offering superior resistance to magnetic fields and temperature variation compared to traditional alloy hairsprings — and delivers a 55-hour power reserve with a self-winding Perpetual rotor. The domed dial in this configuration carries factory-set diamond indexes, each individually certified by Rolex's gemological team. The domed diamond bezel is set with a continuous row of brilliant-cut diamonds and sits atop the polished and brushed 31 mm Oyster case, secured by a screw-down Twinlock winding crown.

The 278xxx Datejust 31 generation, introduced in 2018, represents the most technically advanced iteration of Rolex's mid-size dressy sports watch. Diamond-set variants like 278343 appeal strongly to buyers seeking a versatile timepiece that moves between formal and casual settings. The olive green dial is a sought-after recent configuration, and the Yellow Rolesor material combination has enduring collector appeal for its classical Rolex aesthetic.