Rolex Lady-Datejust 31 31 mm 278383RBRSDJ Steel/Yellow Gold/Diamonds Silver

The Rolex Lady-Datejust is one of watchmaking's most enduring icons, introduced in 1957 as the first self-winding, waterproof watch with an automatic date-change created specifically for women. Over the decades it has evolved in size, material, and decoration while retaining its core identity: a supremely versatile dress watch that carries genuine horological substance beneath every beautifully finished surface. Reference 278383RBRSDJ represents the 31mm generation—a sweet spot in the Lady-Datejust line that offers a generous wrist presence without sacrificing the graceful proportions the model has always championed.

The case of the 278383RBRSDJ is built from Rolex's proprietary Oystersteel, a 904L stainless steel alloy renowned for its exceptional corrosion resistance and mirror-bright polish, combined with 18k yellow gold on the bezel setting, crown, and bracelet center links. This two-tone Rolesor configuration—a term Rolex has used for steel-and-gold combinations since the 1930s—gives the watch a warm, sunlit character that reads as both sporty and luxurious depending on the light and the outfit paired with it.

The bezel is where the 278383RBRSDJ truly announces itself: it is set with brilliant-cut diamonds that encircle the dial in an unbroken ring of light. Diamond bezels on the Lady-Datejust are meticulously hand-set by Rolex's specialist gem-setters in Geneva, with each stone selected for color, cut, and clarity before being individually secured. The result is a bezel that scintillates with every movement of the wrist, elevating a sport-capable Oyster case into the realm of fine jewelry.

Beneath the diamond bezel lies a silver dial—clean, luminous, and timelessly legible. Silver dials have appeared on the Datejust family since its earliest years and remain among the most sought-after configurations precisely because they age gracefully and complement every metal tone. The dial is paired with the characteristic Datejust cyclops lens over the date aperture at 3 o'clock, magnifying the date 2.5× for immediate readability. Power comes from a Rolex automatic movement, offering the reliability and precision that has made Rolex a benchmark for the industry, while the Oyster case provides 100 metres (330 feet) of water resistance—serious protection for everyday wear.

The 31mm Lady-Datejust 278383RBRSDJ wears the five-piece link Jubilee bracelet, a design Rolex debuted alongside the original Datejust in 1945 and named in celebration of the model's tenth anniversary of the brand's founding. The Jubilee's alternating polished center links and satin-finished outer links mirror the two-tone aesthetic of the case and create a fluid, comfortable drape on the wrist. Whether worn to a board meeting, a black-tie event, or a weekend brunch, this bracelet configuration is universally flattering and unmistakably Rolex.

At Bizak & Co. we curate exceptional Rolex timepieces for discerning collectors across the United States, and the Lady-Datejust 31 ref. 278383RBRSDJ is a standout in our current inventory. Its combination of diamond craftsmanship, two-tone Rolesor construction, and the storied Datejust lineage makes it a compelling acquisition whether you are buying your first luxury watch or adding a polished statement piece to an established collection. Browse our listing, reach out to our team with any questions, and let us help you secure this remarkable timepiece with confidence.