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

The Rolex Lady-Datejust is one of the most storied names in fine watchmaking — the Lady-Datejust lineage traces back to 1957, when Rolex introduced the world's first self-winding waterproof wristwatch scaled specifically for a woman's wrist. Decades on, the 31mm case size occupies the sweet spot between the slender 28mm and the full-size 36mm, making it a versatile choice for collectors who appreciate refined proportions without sacrificing legibility. Reference 278343RBRCSJ represents a thoroughly modern interpretation of that legacy, combining Rolex's own Oystersteel alloy with 18k yellow gold and a sparkling diamond-set domed bezel for an aesthetic that is simultaneously sporty and opulent.

The case and bracelet construction of the 278343RBRCSJ exemplify Rolex's obsessive attention to finishing. Oystersteel, a proprietary 904L stainless steel, offers exceptional corrosion resistance and takes a mirror polish that rivals precious metals. The two-tone configuration pairs this steel with warm 18k yellow gold on the bezel, lugs, and Jubilee bracelet centre links — a pairing Rolex has refined over generations. The yellow gold domed bezel is set with diamonds that catch light from every angle, elevating the watch from everyday accessory to genuine jewellery-grade statement piece.

At the heart of the dial sits a champagne finish that has long been associated with understated luxury in the Datejust family. Champagne dials photograph warmly, aging gracefully under changing light conditions, and complement the yellow gold elements of the case and bracelet in a cohesive tonal palette. The iconic date window at three o'clock, protected by the signature Cyclops lens, remains the defining functional signature of every Datejust reference, providing instant, magnified date reading in keeping with the model's original charter.

Powering the watch is a Rolex automatic movement, a self-winding calibre that upholds the brand's reputation for precision and reliability. Rolex movements are manufactured entirely in-house, regulated to chronometer standards certified by the Swiss Official Chronometer Testing Institute (COSC), and then further tested by Rolex's own stringent Superlative Chronometer programme. The Oyster case provides water resistance to 100 metres (330 feet), ensuring this watch is as practical as it is beautiful — suited for everyday life without reservation.

The Jubilee bracelet is an integral part of what makes this reference so desirable. Introduced by Rolex in 1945 alongside the original Datejust, the five-piece link Jubilee design is widely regarded as one of the most elegant metal bracelets ever created. On the 278343RBRCSJ, the bracelet echoes the two-tone theme of the case, with yellow gold centre links flowing into Oystersteel outer links, all secured by the Crownclasp with an Easylink comfort extension system for a perfect fit in every season.

Bizak and Co. is proud to offer this brand-new, certified authentic Rolex Lady-Datejust 31 reference 278343RBRCSJ for sale online. Whether you are buying your first Rolex or adding a definitive two-tone diamond-bezel piece to an established collection, this reference delivers on every dimension — craftsmanship, heritage, wearability, and long-term value. Reach out to the Bizak and Co. team to buy online, ask questions, or arrange a closer look; we are committed to making your acquisition of this exceptional timepiece seamless and confident.