Rolex Datejust 31 Yellow Gold — Dark Mother-of-Pearl Diamond Dial | Ref. 278248

Reference 278248 belongs to the contemporary Datejust 31 family, a collection Rolex refined with expanded case architecture and the introduction of Calibre 2236 — a manufacture movement developed specifically for the brand's 31mm and 28mm ladies' references. Here the 31mm case is realised in 18K yellow gold with a domed bezel, the smooth arc of which traces an uninterrupted line from lug to lug and focuses attention on the dial. That dial is finished in dark mother-of-pearl, a material of uncommon depth: its surface shifts between near-black and iridescent violet-green under different light conditions, creating a visual drama rarely encountered in formal watchmaking.

Ten diamond hour markers punctuate the dial's shifting surface, each stone individually selected for consistent colour and cut. The Cyclops lens above the date aperture at 3 o'clock provides functional magnification, a hallmark of the Datejust since 1953. Powering the watch is the Calibre 2236, featuring Rolex's exclusive Syloxi silicon hairspring — immune to magnetic fields and more stable across temperature variations than traditional alloys — alongside the stop-seconds complication and approximately 55 hours of power reserve.

The President bracelet in 18K yellow gold, with its characteristic semi-circular three-piece links and concealed Crownclasp, wraps the wrist in the same metal as the case. The combination of dark mother-of-pearl and yellow gold is one of the most striking available in the Datejust 31 range — warm metal amplifying the dial's cool iridescence in a dialogue of contrasts that rewards close examination. This is a Datejust for those who understand that restraint and spectacle are not mutually exclusive.