Rolex Datejust 31 Yellow Gold — Fluted Bezel Silver Diamond Dial | Ref. 278278

The Datejust 31 reference 278278 in 18 ct yellow gold represents the line at its most classically configured: a mono-metallic case paired with the fluted bezel first introduced on the Datejust in the 1950s, and a President bracelet that traces its own lineage to 1956. The fluting of the bezel is not merely ornamental — originally intended to tighten the bezel-to-case joint on screw-down models — it has become one of the most recognisable design signatures in watchmaking. In 18 ct yellow gold, each flute catches and redirects light with exceptional sharpness.

The silver dial, set with individual diamond hour markers, articulates the tension between formal restraint and jewellery-grade luxury that defines much of Rolex's intermediate range. Each diamond is hand-selected for cut, colour and clarity, set into individual gold mounts that hold them at a consistent height above the dial surface. The date window at three o'clock sits beneath the Cyclops lens magnifier — bonded directly to the sapphire crystal — amplifying the date 2.5 times for immediate legibility.

Calibre 2236 powers the 278278, a movement that represents Rolex's most technically advanced work in the Lady-size calibre category. The Syloxi hairspring — manufactured from silicon using a photolithographic process that achieves micron-level precision — replaces the traditional Nivarox alloy spring, conferring antimagnetic immunity and superior isochronism. The 55-hour power reserve, Paraflex shock protection and COSC certification round out a movement specification that markedly exceeds the requirements of the price category.