Rolex Datejust Yellow Rolesor — White Roman Dial | Ref. 278243

Rolesor — Rolex's signature combination of Oystersteel and 18-carat yellow gold — has defined a genre of sports-luxury watchmaking since the 1930s. In reference 278243, the 31 mm Datejust realises this pairing with particular sophistication: the robust Oystersteel of the middle case and bracelet contrasts warmly against the yellow gold domed bezel and Jubilee bracelet links, producing a two-tone palette that reads as confident rather than decorative. The white dial with Roman numerals provides a clean, high-contrast face that complements both metals with equal grace.

Calibre 2236 provides the animating intelligence within. This manufacture movement, featuring the silicon Syloxi hairspring and a redesigned escapement geometry, achieves a frequency of 28,800 vibrations per hour while offering immunity to magnetic fields up to 15 gauss. The 55-hour power reserve is more than sufficient for weekend wear without winding, and the central seconds hand sweeps with Rolex's characteristic precision. Date advancement at 3 o'clock occurs instantaneously at midnight via the patented rapid-setting mechanism.

Presented on the yellow Rolesor Jubilee bracelet — its semi-circular three-piece links a hallmark of Rolex's most refined bracelets — this Datejust 31 is secured by a concealed Crownclasp for a seamless finish. A Baselworld 2019 introduction, this reference reflects Rolex's ongoing refinement of a classic form, delivering contemporary movement technology within a timeless two-tone case architecture that has earned its place as one of the most enduring designs in modern watchmaking.