Rolex Datejust 31 Yellow Rolesor — White Roman Dial | Ref. 178243

The Reference 178243 Datejust 31 exemplifies Rolex's mastery of the two-tone aesthetic through its Yellow Rolesor construction — a harmonious marriage of Oystersteel and 18ct yellow gold that defines the bracelet's centre links, the bezel, and the crown. At 31mm the case occupies the sweet spot between the classical Lady-Datejust 28mm and the full-sized 36mm, offering a versatile wearing experience with notable wrist presence. The white dial with Roman numeral hour markers delivers a timeless, legible face whose classical typeface has graced Rolex dials since the early days of the Datejust.

Powering this reference is the Calibre 2235, Rolex's manufacture movement specifically developed for its mid-sized ladies' and intermediate Datejust models. The 2235 features a bi-directional Perpetual rotor for efficient winding, Parachrom hairspring for anti-magnetic and anti-shock resilience, and a date complication with Rolex's signature Cyclops lens on the sapphire crystal for 2.5x date magnification. The movement's meticulous construction meets COSC chronometer standards, certifying its accuracy to within -4/+6 seconds per day.

Two-tone Rolesor Datejust references occupy a fascinating position in the collector market — they embody the more accessible face of Rolex's luxury offering while maintaining genuine precious metal content. The 178xxx series introduced significant case and dial refinements over its predecessors and remains highly sought after in pre-owned condition. Roman numeral dials on Rolesor references carry a particularly classical appeal, connecting modern wearers to a long tradition of horological elegance. A compelling choice for collectors seeking refined versatility at a measured entry point into the Rolex ecosystem.