Rolex Lady-Datejust 31 31 mm 278381RBRRSJ Steel/Rose Gold/Diamonds Slate Rolex Lady-Datejust 31 31 mm 278381RBRRSJ Steel/Rose…

The Rolex Lady-Datejust is one of the most storied references in the world of fine watchmaking—a lineage that traces back to 1957, when Rolex introduced the first Datejust scaled specifically for women. Decades later, the Lady-Datejust 31 occupies a sweet spot between the traditional 28mm and the full-size 36mm, offering a 31mm case diameter that flatters a wide range of wrists while retaining the iconic Datejust silhouette. Reference 278381RBRRSJ represents the model at its most lavish, combining precious materials, gemstone setting, and refined engineering in a single cohesive expression.

The case and bracelet of the 278381RBRRSJ pair 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 for its superior resistance to fading. The result is a warm, two-tone presence that catches light from every angle. Capping the case is a diamond-set bezel, where individually selected brilliant-cut diamonds are set to Rolex's exacting standards of cut, color, and clarity, turning the watch's crown into a continuous ring of brilliance.

The slate dial is one of the most sophisticated color choices in the Lady-Datejust palette. Its cool graphite hue creates striking contrast against the rose-gold and diamond elements, lending the watch a contemporary, almost architectural quality that avoids the overt sweetness sometimes associated with diamond-set dress watches. Index hour markers sit cleanly against the slate ground, ensuring legibility is never sacrificed for glamour—a Rolex hallmark that runs across every complication and price point in the catalog.

Powering the 278381RBRRSJ is a Rolex-certified automatic movement, tested and regulated to Superlative Chronometer standards, meaning it meets COSC certification requirements and Rolex's own stricter in-house precision benchmarks of −2/+2 seconds per day after casing. The movement is sealed within the Oyster case, which Rolex rates to 100 meters (330 feet) of water resistance—protection that makes this Lady-Datejust genuinely versatile, whether worn at a formal dinner or poolside on vacation. The self-winding rotor keeps the watch wound through the natural motion of the wrist, requiring no manual intervention under normal wearing conditions.

On the wrist, the 31mm Oyster case sits with understated authority: large enough to read clearly and carry the diamond bezel with presence, compact enough to layer under a cuff or bracelet stack without conflict. The five-piece-link Jubilee bracelet, first introduced by Rolex in 1945 alongside the original Datejust, adds a supple, almost jewelry-like drape that distinguishes the Lady-Datejust from its sport-oriented siblings. Its concealed Crownadjust clasp allows micro-adjustments for a perfect fit in half-link increments, a practical detail that elevates the wearing experience beyond pure aesthetics.

At Bizak & Co., we specialize in sourcing and presenting pre-owned and new luxury timepieces—including hard-to-find Rolex references like the Lady-Datejust 31 278381RBRRSJ—with full transparency and dealer-level expertise. Whether you are adding to an established collection, purchasing a milestone gift, or buying your first Rolex, our team is ready to answer every question and guide you through the process. Browse our current inventory at bizakandco.com, or reach out directly to inquire about this reference, confirm condition details, and arrange purchase.