Rolex Lady-Datejust 31 31 mm 278343RBRSDO Steel/Yellow Gold/Diamonds Silver

The Rolex Lady-Datejust is one of the most enduring icons in watchmaking history, tracing its lineage to 1957 when Rolex introduced the first truly elegant dress watch scaled specifically for the female wrist. Across more than six decades the Lady-Datejust has remained synonymous with refined femininity, understated luxury, and the flawless movement quality that has made Rolex the world's foremost watch manufacturer. Reference 278343RBRSDO represents the contemporary 31mm expression of that tradition, occupying the sweet spot between the delicate 28mm and the bolder 36mm — a size that wears confidently on a broad range of wrists while retaining every ounce of the Lady-Datejust's legendary elegance.

The case of reference 278343RBRSDO is constructed in a masterful blend of Oystersteel and 18k yellow gold. Oystersteel — Rolex's proprietary 904L stainless steel alloy — is renowned for its exceptional corrosion resistance and the mirror-bright polish it retains over years of wear. Paired with the warmth of 18k yellow gold, the two-tone construction creates a dynamic interplay of cool silver and rich gold tones that has been a hallmark of aspirational Rolex design since the Rolesor concept was first introduced. The result is a 31mm Oyster case that is at once sporty and dressy, robust and refined.

At the heart of this reference's visual drama is the yellow gold domed bezel set with brilliant-cut diamonds. Each stone is individually selected and set by Rolex's in-house gem-setting artisans to exacting standards of cut, color, and clarity, ensuring that the diamond frame around the dial catches the light from every angle. The silver dial within offers a clean, luminous backdrop that amplifies the sparkle of the bezel diamonds while keeping the signature Datejust date window — displayed at the three o'clock position — perfectly legible. Together, dial and bezel create a composition that is unmistakably Rolex: disciplined in layout yet unabashedly luxurious in material.

Powering reference 278343RBRSDO is a Rolex automatic movement, providing the self-winding convenience and long-term reliability expected of every watch bearing the crown. The movement is housed within the legendary Oyster case, engineered to 100 metres (330 feet) of water resistance thanks to its screw-down Triplock or Twinlock crown and screwed case back — a level of protection that gives the wearer genuine peace of mind in daily life. The Oyster bracelet completes the package with its signature three-piece links, a silhouette that is as comfortable as it is classical and one of the most recognized bracelet designs in the world.

For collectors and connoisseurs alike, the Lady-Datejust 31 in reference 278343RBRSDO represents an exceptional opportunity. Its combination of precious metals, gem-setting, and the bulletproof reliability of Rolex's manufacture movements means it functions as both a serious horological instrument and a genuine jewelry piece. Whether purchased as a personal statement, a milestone gift, or a long-term investment in a reference that holds its value with remarkable consistency, this watch rewards its owner on every level. Bizak & Co. offers this reference as a certified authentic, brand-new timepiece, giving buyers complete confidence in provenance and condition.

At Bizak & Co. we are passionate about connecting discerning clients with the finest luxury watches available, and we back every sale with our commitment to authenticity and client satisfaction. Browse reference 278343RBRSDO and our full selection of new and pre-owned Rolex at bizakandco.com, or reach out directly — our specialists are ready to answer your questions, arrange secure shipping, and ensure your purchase is as seamless and pleasurable as the watch itself deserves.