Rolex Datejust 31 Yellow Rolesor — Silver Jubilee Diamond Dial | Ref. 178243

Reference 178243 occupies the intermediate dimension of the Datejust family — the 31 mm case that Rolex designates for wearers who seek a proportion balanced between the 28 mm Lady-Datejust and the 36 mm Datejust. Executed in Yellow Rolesor — 904L Oystersteel with 18 ct yellow gold applied to the bezel, crown, and Oyster bracelet centre links — the watch achieves the warm tonal harmony characteristic of Rolex's two-tone tradition. The domed yellow gold bezel, with its smooth arc uninterrupted by engraving or gem-setting, presents the dial with architecturally restrained elegance.

The silver Jubilee dial, its sunray-brushed finish radiating outward from the centre, serves as the ideal ground for the diamond hour markers mounted in polished gold settings. Each individual diamond is selected and set by Rolex craftspeople trained in the Geneva ateliers of fine jewellery, and the consistent fire and scintillation across all twelve positions attests to the rigorous matching process applied at manufacture. A Cyclops lens over the instantaneous date window at three o'clock and the characteristic Datejust typography in applied gold complete the dial's considered composition.

Calibre 2235 — the movement that powered the 31 mm Datejust prior to the introduction of the 2236 — drives this reference with self-winding reliability and approximately 48 hours of power reserve. Rolex's Parachrom hairspring provides robust resistance to magnetic disturbance and temperature variation, while the Oyster bracelet with its flat three-piece links and Oysterclasp with Easylink extension delivers the ease of daily wear that has kept the Datejust in continuous production since 1945.