Rolex Lady-Datejust 31 31 mm 278343RBRWRO Steel/Yellow Gold/Diamonds White

The Rolex Lady-Datejust has long represented the pinnacle of feminine watchmaking, and the 31mm case size introduced with the contemporary generation strikes an ideal balance between presence and elegance on the wrist. Reference 278343RBRWRO sits at a particularly desirable intersection of the collection, combining Oystersteel's robust durability with the warmth of 18k yellow gold and the brilliance of a diamond-set bezel. Since its introduction to the Lady-Datejust family, the 31mm platform has attracted buyers who want a watch that reads unmistakably as Rolex while offering a versatile size that wears beautifully with everything from casual dress to formal attire.

The case of the 278343RBRWRO measures 31mm in diameter and is constructed from Oystersteel, Rolex's proprietary 904L stainless steel alloy, known for its exceptional resistance to corrosion and its ability to hold a high polish over years of wear. Yellow gold elements—including the crown and key case components—complement the Oystersteel to create the signature Rolesor aesthetic that has defined two-tone Rolex pieces for decades. The overall result is a watch that feels at once sporty and dressy, an achievement only a handful of references in any collection manage convincingly.

At the heart of the dial sits a white Roman numeral chapter ring that lends the 278343RBRWRO an unmistakably classical character. Roman numerals have been a hallmark of the Datejust since the model's earliest decades, evoking heritage and timeless style. The white dial provides maximum legibility and a bright canvas that catches the light in concert with the surrounding diamond bezel, creating a coherent visual narrative of luxury without excess.

The yellow gold domed bezel set with diamonds is arguably the most eye-catching attribute of this reference. The domed profile is a nod to vintage Datejust aesthetics, while the diamond setting transforms the bezel into a continuous ring of light that frames the dial magnificently. Paired with the Oyster bracelet—Rolex's iconic three-piece link design known for its strength and comfort—the watch sits securely and elegantly on the wrist. The Oyster bracelet integrates seamlessly with the two-tone case, and its Oysterclasp ensures a secure, easy-to-adjust fit for daily wear.

Powering the Lady-Datejust 31 278343RBRWRO is a Rolex automatic movement, the hallmark of the brand's commitment to in-house mechanical excellence. Automatic winding means the watch is kept running by the natural motion of the wearer's wrist, requiring no battery and offering the deeply satisfying experience of a purely mechanical timepiece. The watch is also water resistant to 100 meters (330 feet), a specification delivered by Rolex's Oyster case construction with its screw-down crown—making this a genuinely robust companion for everyday life, not merely a display piece.

Buying a Rolex Lady-Datejust 31 reference 278343RBRWRO from Bizak & Co. means working with a dealer who understands this reference intimately and is committed to transparency and quality. Whether you are adding to an existing collection or purchasing your first luxury watch, our team is ready to answer every question and guide you to complete confidence in your purchase. Explore this reference at bizakandco.com or reach out directly—we invite you to experience the Bizak & Co. difference.