Rolex Datejust Yellow Rolesor — Mother-of-Pearl Diamond Dial | Ref. 278243

Among the more jewellery-forward configurations in the Datejust 31 family, reference 278243 pairs Yellow Rolesor construction with a mother-of-pearl dial set with diamond hour markers — a combination that bridges fine watchmaking and gem-set luxury. The 278xxx generation succeeded the 178xxx series, bringing with it updates to movement, bracelet options, and dial finishing. Mother-of-pearl dials are harvested from bivalve shells and exhibit a naturally iridescent quality that shifts subtly with ambient light, ensuring that no two examples present identically. The diamond indices amplify this effect, catching light at unexpected angles.

Calibre 2236 — Rolex's self-winding movement for the 31 mm platform — provides approximately 55 hours of power reserve and incorporates the Syloxi silicon hairspring, a component that delivers improved resistance to magnetic interference without requiring anti-magnetic shielding. The case is constructed from Oystersteel and 18k yellow gold in the Rolesor configuration, with the Oyster bracelet echoing this two-tone treatment through alternating polished and satin-finished links. Rolex's Triplock crown seal and screw-down case back maintain water resistance to 100 metres.

This reference speaks to collectors who approach the Datejust as a jewellery piece as much as a precision instrument. Diamond-set dials on production Rolex watches retain their factory integrity, distinguishing them from aftermarket modifications that can significantly affect resale value. The 278243 in this configuration represents one of the more decorative entries in the standard Datejust range without venturing into the bespoke territory of the Pearlmaster, making it accessible and relatively more available than fully jewelled references.