Rolex Datejust 31 31 mm 278344RBRGNSJ Steel/White Gold/Diamonds Green

The Rolex Datejust is one of the most iconic and enduring watch designs in horological history, having debuted in 1945 as the first self-winding wristwatch to display the date in a window on the dial. Over the decades, Rolex has refined and expanded the Datejust family into a range of sizes and materials, with the 31mm format occupying the sweet spot between the petite Lady-Datejust and the full-size 36mm and 41mm models. The 31mm Datejust has earned a loyal following among wearers who appreciate a case that wears with authority while remaining perfectly proportioned on a wide range of wrist sizes.

Reference 278344RBRGNSJ represents a particularly elevated expression of the Datejust 31 lineage. The case and bracelet combine polished Oystersteel with 18k white gold accents, giving the watch a two-tone brilliance that feels both sporty and luxurious. The hallmark fluted silhouette of the Datejust family is reinterpreted here through the diamond-set domed bezel in 18k white gold, where individually set stones create a continuous arc of light around the dial—an unmistakable signature that elevates this reference well above a standard steel configuration.

The mint green dial is the centerpiece of this reference and one of its most compelling selling points. Rolex's lacquered mint green finish is a cool, sophisticated tone that sits between a classic silver and a bolder statement green, catching light in a way that feels fresh without being loud. Index hour markers set into the dial surface maintain the Datejust's clean, legible character, ensuring the watch remains as practical as it is beautiful. The interplay between the green dial and the white gold diamond bezel creates a contrast that is effortlessly chic.

Powering this Datejust 31 is an automatic movement, consistent with Rolex's long-standing commitment to in-house mechanical manufacture. The watch is water resistant to 100 meters (330 feet), reflecting the robust Oyster case construction that Rolex pioneered and that ensures the movement is protected against dust, pressure, and moisture in everyday wear. The five-piece-link Jubilee bracelet—introduced alongside the very first Datejust in 1945—completes the watch with a supple, dressy feel and the same meticulous finishing applied throughout the case.

Buying this Rolex Datejust 31 reference 278344RBRGNSJ from Bizak and Co. means acquiring a timepiece from a trusted luxury watch dealer committed to accuracy and transparency. Bizak and Co. is not an authorized Rolex dealer, and all brand references belong to Rolex SA; however, our team brings deep expertise in pre-owned and gray-market luxury watches to help you find the right piece at a competitive price. Visit bizakandco.com or reach out directly to our team to learn more about availability, condition, and how to buy this stunning Datejust 31 online.