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

The Rolex Lady-Datejust is one of the most enduring icons in watchmaking history, and the 31mm iteration — reference 278243CSJ — represents the line at its most refined. Introduced to bridge the gap between the smaller 28mm and the full-size 36mm Datejust, the 31mm case size has won legions of admirers who seek a substantial yet undeniably feminine presence on the wrist. This particular reference arrives brand new, offering its future owner the full pleasure of unwrapping a piece of horological history.

The case and bracelet of the 278243CSJ are crafted in a two-tone configuration that Rolex calls Rolesor — pairing its proprietary Oystersteel with 18k yellow gold. Oystersteel belongs to the 904L steel family, an alloy prized in the aerospace and chemical industries for its exceptional corrosion resistance and its ability to take and hold a mirror polish far longer than conventional 316L steel. The yellow gold elements — bezel, crown, and bracelet center links — are cast in Rolex's own 18k yellow gold, produced in the brand's in-house foundry to exacting standards of purity and color consistency.

The champagne dial is the visual heart of this watch. Rich, warm, and luminous, a champagne-toned dial has a timeless quality that flatters a wide range of skin tones and pairs effortlessly with gold jewelry. The yellow gold domed bezel frames the dial with a smooth, understated elegance that distinguishes this reference from more ornate or gem-set alternatives — a deliberate choice for the buyer who values classic restraint over flamboyance. The date aperture at three o'clock, complete with Rolex's signature Cyclops lens on the crystal, ensures legibility at a glance without disturbing the dial's balanced composition.

Powering the Lady-Datejust 31 is a self-winding automatic movement, a hallmark of Rolex reliability. Rolex manufactures its movements entirely in-house at its Geneva facilities, subjecting each caliber to rigorous testing that exceeds standard COSC chronometer certification requirements. The result is a movement that keeps exceptional time with minimal maintenance, making this watch as dependable as it is beautiful. Water resistance is rated to 100 meters (330 feet), underscoring the Oyster case's legendary robustness.

On the wrist, the 31mm Jubilee-bracelet configuration of reference 278243CSJ achieves a balance that fewer watches manage: it reads as a dress watch yet wears with the confidence of a sports model. The five-piece Jubilee bracelet, originally introduced alongside the Datejust in 1945, adds a sense of craftsmanship and movement to the wrist, its polished center links contrasting beautifully with the satin-brushed outer links. Whether worn daily or reserved for special occasions, this watch is engineered to last a lifetime.

Bizak & Co. is pleased to offer this certified authentic, brand-new Rolex Lady-Datejust 31 reference 278243CSJ. As a dedicated luxury watch dealer, we take pride in sourcing only genuine timepieces and providing a transparent, personalized buying experience. Whether you are adding to an established collection or purchasing your first Rolex, our team is ready to guide you through every step. Reach out to us at bizakandco.com or contact us directly — we look forward to helping you acquire this extraordinary watch.