Rolex Datejust 31 Everose Rolesor — Fluted Bezel Rose Index Dial | Ref. 278271

Confident in its femininity yet uncompromising in its mechanical character, the Datejust 31 reference 278271 in Everose Rolesor makes a compelling case for the two-tone aesthetic at the 31 mm scale. The combination of Oystersteel and 18ct Everose gold — Rolex's proprietary rose-gold alloy formulated with a platinum additive to resist the fading that affects conventional rose gold — creates a watch that glows with warmth without sacrificing the durability of steel. The fluted bezel, executed in polished Everose gold, catches the light in crisp geometric facets that animate the watch across different lighting conditions, while the rose index dial below mirrors that warmth with its blush-toned applied hour markers.

Calibre 2236, Rolex's dedicated manufacture movement for the Datejust 31 and Lady-Datejust 28, drives the 278271 with a 55-hour power reserve and the precision of Superlative Chronometer certification. The defining innovation of this movement is the Syloxi hairspring — a silicon-based spiral spring of patented geometry developed entirely within Rolex's Bienne manufacturing facilities. Silicon's properties render the Syloxi immune to magnetic fields that would compromise a conventional metallic hairspring's rate, while its dimensional stability across temperature changes enhances long-term accuracy reliability.

Mounted on the Oyster bracelet in Everose Rolesor, the 278271 pairs the sporty three-link structure of Rolex's original bracelet design with the dressed character of a two-tone case. The bracelet terminates in a folding Oysterclasp with the Easylink 5 mm extension system, allowing precise fit adjustment without tools. For the collector who appreciates the technical rigour of a manufacture movement within a jewellery-inflected design, the 278271 represents the Datejust 31 at its most visually compelling.