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

The Rolex Lady-Datejust is one of the most enduring icons in watchmaking history, introduced in 1957 as the first self-winding waterproof watch with a date display sized specifically for women. Over more than six decades the collection has remained true to its founding principles—elegance, precision, and versatility—while embracing each era's finest materials and craftsmanship. Reference 278381RBRRSO represents the current expression of that tradition in the 31mm mid-size format, a sweet spot that wears beautifully on a wide range of wrist sizes and has attracted a devoted following among collectors who appreciate both understated refinement and genuine mechanical substance.

The case and bracelet of this Lady-Datejust 31 are crafted in Rolesor, Rolex's proprietary combination of Oystersteel—an austenitic 904L alloy prized for its corrosion resistance and mirror-polished brilliance—and 18k Everose gold, the brand's exclusive rose-gold alloy formulated to retain its warm blush tone without fading over time. At 31mm in diameter, the Oyster case is classic in proportion, with polished and brushed surfaces that catch and reflect light from every angle. The Oyster bracelet echoes that two-tone aesthetic, its center links rendered in Everose gold flanked by Oystersteel outer links for a look that is luxurious yet wearable every day.

The dial is finished in slate, a sophisticated cool-gray hue that reads differently under shifting light conditions—silvery and luminous in bright sun, deep and moody in softer indoor settings. Index hour markers punctuate the dial with clean geometry, complemented by the signature Rolex magnified date window at three o'clock framed by the iconic Cyclops lens. Crowning the case, the bezel is set with a continuous ring of pavé-set diamonds, adding a layer of brilliance that elevates this reference from everyday elegance to genuine fine jewelry territory without sacrificing the watch's sporty Oyster DNA.

Beneath the case, an automatic movement drives the watch with the reliability and accuracy that define the Rolex standard. Water resistance to 100 meters (330 feet) is ensured by the screw-down Twinlock crown and the Oyster case construction, making this Lady-Datejust fully capable of accompanying an active lifestyle—whether at the pool, on vacation, or through the demands of daily wear. The combination of Swiss automatic precision, robust waterproofing, and precious materials in a single package is precisely what has made the Datejust family the world's best-selling luxury watch for generations.

For collectors and first-time luxury watch buyers alike, the Lady-Datejust 31 in reference 278381RBRRSO offers exceptional long-term value. Two-tone Rolex models with diamond bezels and distinctive slate dials tend to hold their desirability well in the secondary market, supported by the brand's unmatched global recognition and the enduring appeal of the Datejust design. The Everose gold and Oystersteel pairing, in particular, has proven perennially popular, transcending seasonal fashion trends to remain a perennial collector favorite.

At Bizak and Co., we specialize in sourcing and presenting fine pre-owned and new luxury timepieces with the transparency and expertise that discerning buyers deserve. Our team is available to answer detailed questions about this Lady-Datejust 31, discuss condition, provenance, and any accompanying documentation, and guide you through a secure purchase process. Browse our curated inventory at bizakandco.com or reach out directly—we are here to help you acquire the perfect watch with confidence.