Rolex Datejust 31 White Rolesor — Dark Grey Index Dial, Diamond Bezel | Ref. 278384RBR

Calibrated at 31 mm, the Datejust 31 occupies a sweet spot in the Rolex collection: larger than the Lady-Datejust 28 yet intimate enough to wear with jewellery-forward intent. Reference 278384RBR presents the case in White Rolesor — 904L Oystersteel paired with 18-carat white gold — with a bezel pavé-set with 46 brilliant-cut diamonds selected for colour and brilliance consistency across the full circumference. The monobloc middle case is produced to tolerances measured in hundredths of a millimetre, with the screw-down back and Twinlock crown maintaining 100-metre water resistance even as gem-setting transforms the bezel into a constellation of light.

Dark grey dials have long been favoured by watch collectors for their versatility: deep enough to provide contrast against light-coloured markers yet neutral enough to transition from daytime to evening wear without visual disruption. Here, applied index hour markers in white metal punctuate the grey ground with clean precision, while the Cyclops-magnified date at 3 o'clock sits beneath double anti-reflective coating that virtually eliminates glare in challenging lighting conditions. The overall composition is spare and assured — a dial designed to be read at a glance and admired at leisure.

The self-winding Calibre 2236 animates the 278384RBR, a movement developed specifically for mid-size Datejust models and featuring the Syloxi hairspring — a Rolex-patented silicon component that offers superior resistance to shocks and temperature variations compared to traditional metal alloy springs. With a 55-hour power reserve, COSC chronometer certification, and the additional Superlative Chronometer rating confirming ±2-second daily accuracy, the 2236 represents the current state of the art for this case diameter. A stainless steel Jubilee bracelet with concealed Crownclasp completes the reference.