Rolex Datejust 31 31 mm 278384RBRGNSO Steel/White Gold/Diamonds Green

The Rolex Datejust is one of the most storied references in watchmaking history, introduced in 1945 as the first self-winding wristwatch to display the date in a window on the dial—an innovation that gave the collection its name. More than seven decades later, the Datejust 31 occupies a special position in the lineup: sized at 31mm, it is the quintessential mid-size offering, scaled precisely for wrists that find the 36mm too substantial yet desire more presence than smaller dress watches typically provide. The reference 278384RBRGNSO is a modern iteration that channels all of that heritage while layering in a level of jewellery-grade finishing that elevates it firmly into luxury territory.

The case of the 278384RBRGNSO is built in Rolex's proprietary Oystersteel—a grade of 904L stainless steel chosen for its exceptional resistance to corrosion and its ability to accept an unusually high mirror polish—combined with 18k white gold elements that lend a cooler, more sophisticated lustre than yellow or Everose gold. The result is a two-tone aesthetic that is unmistakably Rolex yet subtly differentiated from the brand's more common Rolesor configurations. At 31mm across, the Oyster case wears elegantly without dominating the wrist, and the water resistance to 100 metres means this is a watch built to be worn, not merely admired.

The dial is where this reference truly announces itself. The mint green colour occupies a coveted position in the Rolex chromatic palette—saturated enough to read as a genuine design statement, yet soft enough to complement a wide range of wardrobe choices from casual to formal. Diamond index hour markers replace the standard applied indices, catching light with every movement of the wrist and reinforcing the jewellery-watch character of the piece. The overall impression is one of confident, understated luxury rather than ostentation.

The bezel is set entirely with brilliant-cut diamonds, a feature that transforms the functional outer ring of the watch into a continuous band of sparkle encircling the dial. Rolex's gem-setting standards are exacting: each stone is individually selected for cut, colour, and clarity before being set by specialist craftspeople in Geneva. This diamond bezel is one of the defining attributes that places the 278384RBRGNSO at the premium end of the Datejust 31 range. The watch is completed by the Oyster bracelet, Rolex's three-link flat bracelet celebrated for its robustness, comfort, and the signature brushed-and-polished interplay of its links—a combination that works harmoniously with the steel and white gold case.

Powering the watch is a Rolex automatic movement, delivering the self-winding reliability and accuracy that have become synonymous with the brand worldwide. Buyers can wear this reference with absolute confidence in its mechanical integrity and long-term durability. At Bizak & Co., every pre-owned Rolex is carefully evaluated before being offered for sale, and our team of experts is available to answer any questions about this specific reference. Whether you are adding a statement mid-size Rolex to your collection or searching for an exceptional gift, the Datejust 31 278384RBRGNSO available at bizakandco.com represents a compelling opportunity to acquire one of the most desirable configurations in the modern Datejust family. Reach out to Bizak & Co. to confirm current availability and to buy this watch online with confidence.