Rolex Lady-Datejust 31 31 mm 278243BMDO Steel/Yellow Gold Black Mother of Pearl

The Rolex Lady-Datejust is one of the most enduring icons in watchmaking history, having defined the archetype of the elegant sports-dress watch for women since its introduction as the first self-winding waterproof wristwatch designed specifically for women. The 31mm case size sits at the heart of the Lady-Datejust family, offering a balanced presence that reads refined on the wrist without sacrificing legibility – a size that has remained a perennial favorite among collectors and first-time Rolex buyers alike. Reference 278243BMDO represents a thoroughly contemporary interpretation of this storied lineage, pairing a two-tone Oystersteel and 18k yellow gold construction with one of the most captivating dial options in the lineup.

The case of the 278243BMDO is rendered in Rolex's proprietary Oystersteel, an alloy from the 904L family renowned for its exceptional corrosion resistance and mirror-polished luster, complemented by 18k yellow gold accents that warm the overall palette. The Oyster case is water resistant to 100 meters (330 feet), secured by a screw-down Triplock crown, and engineered to the exacting tolerances that make Rolex watches as functional as they are beautiful. The result is a 31mm case that feels substantial yet never oversized, sitting flush and secure on a wide range of wrist sizes.

The dial is where this reference truly commands attention. The black mother of pearl surface captures and refracts light differently with every movement, producing an organic, living quality that no painted or lacquered dial can replicate. Each mother of pearl dial is unique by nature, meaning no two examples of the 278243BMDO will look precisely identical – a detail appreciated by discerning collectors who prize individuality within a watch produced to Rolex's legendary consistency standards. The date window at 3 o'clock is magnified by the iconic Cyclops lens, keeping the watch unmistakably Datejust.

The yellow gold domed bezel frames the dial with classic Rolex elegance, its smooth profile referencing the earliest Datejust bezels while harmonizing with the yellow gold elements throughout the case and bracelet. The Oyster bracelet – perhaps the most recognized bracelet in watchmaking – provides a three-link flat design in Oystersteel with yellow gold center links, secured by a folding Oysterclasp for effortless wearability. Automatic movement drives the watch, offering the convenience of self-winding operation rooted in decades of Rolex horological expertise.

For buyers searching to buy the Rolex Lady-Datejust 31 278243BMDO online, Bizak & Co. presents this reference as brand new, offering the full assurance of certified authenticity. Whether you are a seasoned Rolex collector adding a two-tone Lady-Datejust to your rotation, or a first-time buyer seeking a timepiece that will appreciate in cultural and monetary value for decades, the 278243BMDO is a compelling choice. Contact the team at Bizak & Co. at bizakandco.com for pricing, availability, and to complete your purchase with confidence.