Rolex Datejust Everose Rolesor — Black Diamond Dial, Fluted Bezel | Ref. 126231

Among the most refined expressions of Rolex's two-metal Rolesor philosophy, the Datejust 36 reference 126231 pairs the warmth of 18-carat Everose gold with the resilience of 904L Oystersteel in a combination that has defined horological elegance since the technique was pioneered by the brand in 1933. The 36 mm Oyster case, redesigned for Baselworld 2018 with subtly reshaped lugs and case flanks, retains the iconic proportions that made the Datejust the world's first self-winding waterproof wristwatch to feature an automatically changing date at 3 o'clock — a milestone achieved in 1945.

At the heart of the dial lies a study in contrast: polished black lacquer set with ten individual brilliant-cut diamond hour markers whose facets catch the light against the deep ground. The 18-carat Everose fluted bezel — a signature element of the Datejust since its inception — frames the chapter ring with its characteristic engine-turned ridges, each one precision-machined to reflect light across the wrist. A scratch-resistant sapphire crystal fitted with a Cyclops magnification lens over the date window completes the front architecture, while the screwed-down case back and Twinlock screw-down Everose crown ensure 100-metre water resistance throughout.

Powering the reference 126231 is Rolex Calibre 3235, the manufacture's flagship self-winding movement, introduced alongside this generation of Datejust and representing a wholesale advancement over the preceding Cal. 3135. Built around a redesigned Perpetual rotor, the 3235 incorporates the Chronergy escapement — a patented innovation combining a nickel-phosphorus lever and escape wheel for 15 percent greater energy efficiency — and delivers a 70-hour power reserve. The movement is chronometer-certified by the COSC and additionally regulated to Rolex's own Superlative Chronometer standard of ±2 seconds per day. An Everose Rolesor Oyster bracelet with the Easylink 5 mm comfort extension link completes this timepiece.