Rolex Lady-Datejust 31 31 mm 278381RBRWRO Steel/Rose Gold/Diamonds White

The Rolex Lady-Datejust has long been the definitive expression of feminine watchmaking excellence, tracing its roots to 1957 when Rolex introduced a scaled, date-displaying companion to the original Datejust. Over the decades the collection has evolved in materials, dial treatments, and gem-setting techniques while retaining the instantly recognizable Datejust DNA — the fluted or jewelled bezel, the cyclops date magnifier, the Jubilee or Oyster bracelet — that makes it one of the most recognized luxury watch silhouettes on earth. The 31mm case size sits precisely between the 28mm Lady-Datejust and the full-size 36mm Datejust, offering a versatile proportion that reads as a classic dress watch on a slender wrist yet carries genuine wrist presence on a more athletic build.

Reference 278381RBRWRO represents the pinnacle of the current Lady-Datejust 31 lineup. The case and bracelet unite Oystersteel — Rolex's proprietary 904L stainless steel renowned for its exceptional corrosion resistance and mirror-bright polish — with 18k Everose gold, the in-house rose gold alloy Rolex developed to resist fading over time. That two-tone combination, known in the Rolex catalog as Rolesor, gives the watch a warm, layered visual depth that a single-material case simply cannot replicate.

The bezel of the 278381RBRWRO is set with diamonds, adding a continuous ring of brilliance that frames the dial and catches light from every angle. Beneath it the white Roman dial offers a clean, legible backdrop: the Roman numeral hour markers recall classical watchmaking traditions and contrast beautifully against the white surface, while the date window at three o'clock — magnified by Rolex's signature Cyclops lens — delivers the practical functionality the Datejust line has always championed. Together, diamond bezel and Roman numeral dial create a composed, formally dressed aesthetic that transitions effortlessly from boardroom to evening event.

The watch is driven by an automatic movement, meaning it winds itself through the natural motion of the wearer's wrist and requires no battery. The Oyster case is water-resistant to 100 meters (330 feet), making this far more than a delicate display piece — it is a robust, daily-wear instrument built to Rolex's famously exacting tolerances. The three-link Oyster bracelet completes the package with a secure, comfortable fit and the same Oystersteel-and-Everose-gold two-tone treatment as the case, giving the watch a seamless, unified appearance on the wrist.

For collectors and first-time luxury watch buyers alike, the Lady-Datejust 31 ref. 278381RBRWRO represents a sound and enduring acquisition. The Datejust family consistently demonstrates strong long-term desirability in the secondary market, and this diamond-bezel Rolesor configuration is among the most requested Lady-Datejust references we see inquiries for. At Bizak & Co. we source each piece with care and present it with full transparency about its condition and provenance. Browse our current inventory online or reach out directly — our team is ready to answer every question and guide you through a purchase you will wear and treasure for decades.