Rolex Datejust 31 Yellow Rolesor — Slate Grey Roman Dial, Fluted Bezel | Ref. 178273

The slate grey dial of this Datejust 31 is one of those rare colour choices that occupies the comfortable territory between the formal and the contemporary — deep enough for evening wear, understated enough for the office. Reference 178273 in Yellow Rolesor combines the warm luminosity of an 18 ct yellow gold fluted bezel with the cool industrial refinement of the Oystersteel case, a pairing whose inherent contrast only grows more compelling against the grey dial ground.

Roman numerals in applied yellow gold provide a legible and traditionally minded hour designation, their serif forms lending the dial the considered character of fine stationery. The matching yellow gold-tipped hands sweep across the dial with the measured authority of a well-regulated movement, while the Cyclops lens over the date window ensures that the calendar complication is as functional as it is elegantly integrated. The Oyster bracelet — with its three-piece link construction and folding Oysterclasp — secures the watch with robust dependability.

Calibre 2235, the self-winding movement at this reference's core, benefits from Rolex's Parachrom blue hairspring — manufactured in-house from a paramagnetic alloy that is up to ten times more resistant to shocks than a conventional hairspring. Operating at 28,800 vph and offering an approximate 48-hour power reserve, it provides the accuracy and consistency that serious watch wearers require. Waterproofness to 100 metres rounds out the practical credentials of a timepiece designed to be worn and enjoyed every day.