Rolex Lady-Datejust 31 31 mm 278381RBRWMDO Steel/Rose Gold/Diamonds White Mother of Pearl

The Rolex Lady-Datejust is one of the most enduring icons in watchmaking history, introduced as the first self-winding waterproof wristwatch with a date function sized specifically for women. Since its debut in 1957, the Lady-Datejust has been synonymous with understated luxury, precise engineering, and the kind of timeless aesthetic that transcends trends. Reference 278381RBRWMDO represents the contemporary 31 mm expression of this legacy, a size that occupies the sweet spot between the slender 28 mm Lady-Datejust and the full-sized 36 mm Datejust, offering a balanced wrist presence that reads as both modern and classic.

The case and bracelet of reference 278381RBRWMDO are constructed in Rolex's proprietary Oystersteel, a 904L stainless steel alloy prized for its exceptional resistance to corrosion and its ability to take a high mirror polish, paired with 18k Everose gold—Rolex's exclusive rose gold alloy formulated to retain its warm blush hue for the life of the watch. This two-tone combination, sometimes called Rolesor, has been a hallmark of the Datejust family for decades and gives the 278381RBRWMDO a versatility that transitions effortlessly from casual to formal settings. The 31 mm Oyster case is rated to 100 metres (330 feet) of water resistance, underscoring the robust engineering beneath its jeweled exterior.

The dial is finished in white mother-of-pearl, a material prized for its natural iridescence and the way it shifts subtly under changing light conditions. No two mother-of-pearl dials are ever identical, lending each watch a quietly individual character. Diamond hour markers replace the standard applied indices, scattering light across the dial and elevating the overall composition from elegant to genuinely luxurious. Surrounding the dial, the bezel is fully set with brilliant-cut diamonds, a feature that transforms the Oyster case's architectural crown into a glittering frame that rivals dedicated jewelry pieces while retaining all of the Datejust's functional DNA.

Power comes from a Rolex automatic movement, the self-winding mechanical caliber housed in the Oyster case and regulated to Rolex's exacting chronometric standards. Rolex automatic movements are renowned for their reliability, long service intervals, and consistent timekeeping, qualities that make the Lady-Datejust as practical a daily companion as it is a statement of personal style. The Oyster bracelet—one of the most recognized bracelet designs in the world—provides a secure, comfortable fit and complements the mixed-metal aesthetic of the case perfectly, its alternating polished and satin-finished links echoing the interplay of steel and Everose gold.

For collectors and first-time luxury watch buyers alike, reference 278381RBRWMDO is one of the most desirable Lady-Datejust configurations on the secondary market. The combination of a diamond bezel, diamond dial, mother-of-pearl, and two-tone Rolesor construction represents the full expression of the model's high-jewelry potential without sacrificing the versatility and wearability that define the Datejust line. It is equally at home at a formal dinner, a business meeting, or a weekend brunch, and its classic proportions mean it will remain stylish for decades to come.

At Bizak & Co., we specialize in sourcing and presenting pre-owned and new luxury timepieces with the attention to detail and transparency that discerning buyers deserve. Browse reference 278381RBRWMDO and our full Rolex selection at bizakandco.com, or reach out directly to our team for expert guidance, detailed condition information, and a seamless buying experience. Please note that Bizak & Co. is not an authorized Rolex dealer; all watches are sold on the secondary market.