Rolex Lady-Datejust 31 31 mm 278243CSO Steel/Yellow Gold Champagne

The Rolex Lady-Datejust is one of the most enduring icons in watchmaking history, introduced in 1957 as the first self-winding, waterproof, and date-displaying wristwatch scaled for women—a milestone that redefined expectations for feminine luxury timepieces. The 31mm case size, positioned between the 28mm Lady-Datejust and the full-size 36mm Datejust, has become a contemporary favorite precisely because it suits a wide spectrum of wrist sizes while retaining every hallmark of the Datejust DNA: the cyclops lens magnifying the date, the fluted or domed bezel, and the iconic Oyster case architecture.

Reference 278243CSO expresses the Lady-Datejust in one of its most classically appealing configurations. The 31mm Oyster case is crafted from a seamless combination of Oystersteel—Rolex's proprietary 904L stainless steel celebrated for its exceptional corrosion resistance and mirror-like polish—and yellow gold, the pairing that Rolex designates Rolesor. This two-tone construction brings warmth and visual contrast to the case and bracelet without the full heft of an all-gold watch, striking a balance that has made Rolesor references perennially popular across generations.

The champagne dial is the centerpiece of this reference, its warm golden-toned surface catching light in ways that shift subtly with the hour. Champagne dials have long been associated with understated opulence, complementing both the yellow gold bezel and the Rolesor Oyster bracelet while remaining versatile enough to pair with everything from business attire to formal eveningwear. The yellow gold domed bezel frames the dial with a smooth, unadorned elegance that lets the champagne sunburst speak for itself, a deliberate design choice that keeps the watch refined rather than embellished.

Powering the 278243CSO is Rolex's self-winding automatic movement, a perpetual rotor caliber from the manufacture's modern Lady-Datejust generation known for its robustness and certified chronometric precision. The movement is housed within a fully sealed Oyster case rated to 100 meters (330 feet) of water resistance—reassuring everyday protection far beyond what most dress watches offer. The Triplock crown and screw-down caseback ensure that the movement remains shielded from moisture and dust whether the wearer is at a board meeting or a poolside brunch.

Wearing the Lady-Datejust 31 ref. 278243CSO is an experience defined by proportion and wearability. The 31mm diameter sits elegantly on the wrist without overcrowding smaller wrists or appearing delicate on larger ones, and the Oyster bracelet's combination of center and outer links in contrasting metals provides a secure, comfortable fit throughout the day. This is a watch that earns compliments in the boardroom and on the red carpet alike, a hallmark of genuinely versatile luxury.

At Bizak & Co., we offer this Lady-Datejust 31 in certified brand-new condition, complete with box and papers, giving you full assurance of authenticity and traceability. Our team of knowledgeable specialists is available to answer every question and guide you through a seamless, transparent purchase. Browse our curated Rolex selection at bizakandco.com or reach out directly—owning the 278243CSO through Bizak & Co. means acquiring not just a watch but a relationship with a dealer who stands behind every timepiece we sell.