Rolex Lady-Datejust 31 31 mm 278343RBRCSO Steel/Yellow Gold/Diamonds Champagne

The Rolex Lady-Datejust 31 is one of the most storied timepieces in watchmaking history, representing decades of refinement within the iconic Datejust family — the world's first self-winding waterproof wristwatch to display the date in a window on the dial. The 31mm case size occupies the sweet spot between the smaller 28mm Lady-Datejust and the full-sized 36mm Datejust, making it a versatile choice for a wide range of wrists. Reference 278343RBRCSO brings this heritage into sharp, contemporary focus with a two-tone execution and diamond embellishment that few watches at any price point can match.

The case and Oyster bracelet of the 278343RBRCSO are constructed in a combination of Rolex's proprietary Oystersteel — an alloy from the 904L steel family prized for its exceptional corrosion resistance and mirror-like polish — and 18k yellow gold. This pairing, sometimes called Rolesor in Rolex parlance, has been central to the Datejust's identity since its early decades and gives the watch an unmistakable warmth without sacrificing the casual durability of steel. The result is a timepiece that transitions fluidly from a business setting to a formal evening occasion.

At the center of the visual appeal is the champagne dial, whose warm golden-beige hue plays beautifully against the yellow gold accents of the case, bezel, and bracelet center links. Index hour markers anchor the dial in a classically legible layout, ensuring that the 278343RBRCSO remains as functional as it is beautiful. The yellow gold domed bezel set with diamonds adds a crown jewel element, catching light from every angle and elevating the reference firmly into luxury territory.

Powering the Lady-Datejust 31 is Rolex's automatic movement, a self-winding caliber that is regulated and certified to meet the strict precision standards Rolex applies across its entire manufacture. The watch carries a water resistance of 100 meters (330 feet) thanks to the Oyster case architecture — the same hermetically sealed construction that has protected Rolex movements since 1926. This means the 278343RBRCSO is not merely a dress watch but a capable everyday companion that can accompany its wearer through the full range of daily life.

For collectors and first-time buyers alike, the Lady-Datejust 31 in reference 278343RBRCSO represents one of the smartest entry points into the world of diamond-set Rolex watches. The two-tone Rolesor configuration and diamond bezel deliver exceptional visual impact while the Oyster bracelet ensures long-term wearability and comfort. Demand for this reference remains strong on the secondary market, supporting its value as a considered purchase rather than a simple luxury indulgence.

At Bizak & Co., we are passionate about connecting discerning buyers with exceptional timepieces. While we are not an authorized Rolex dealer, our team brings deep expertise to the sourcing and presentation of Rolex watches for sale, including rare and in-demand references like the 278343RBRCSO. We invite you to contact us directly to learn more, ask questions, or begin the process of adding this remarkable Lady-Datejust 31 to your collection. Browse our full inventory at bizakandco.com and discover why collectors trust Bizak & Co. for their most important watch purchases.