Rolex Datejust 31 31 mm 278384RBRGDJ Steel/White Gold/Diamonds Grey

The Rolex Datejust is widely regarded as the archetype of the classic dress watch—a model that has remained in continuous production since 1945 and has earned its status as one of the most recognizable timepieces in horological history. Within that storied lineage, the Datejust 31 occupies a uniquely versatile position: at 31 mm it transcends traditional gender categories and sits comfortably on a broad range of wrist sizes, offering the same Rolex engineering and finishing standards found in the full-size 41 mm models but scaled to a more refined, understated silhouette.

Reference 278384RBR represents the pinnacle expression of the Datejust 31 for those who value diamond embellishment without excess. The case is constructed from Rolex's proprietary Oystersteel—a 904L stainless steel alloy prized for its corrosion resistance and mirror-polished luster—paired with 18k white gold accents that lend the watch a cool, platinum-like elegance. Together these materials create the iconic two-tone aesthetic that has defined countless aspirational Rolex references across decades.

The dark grey dial on the 278384RBR is a study in restrained drama. The deep, almost charcoal tone is set off by a field of brilliant-cut diamonds that serve as hour markers, catching light from every angle and lending the dial a dynamic brilliance that changes throughout the day. The surrounding diamond-set bezel amplifies this effect, framing the dial with a continuous parade of stones that add substantial sparkle without overwhelming the clean, date-forward layout Datejust collectors have always prized. The date window at three o'clock, framed by Rolex's signature Cyclops lens for 2.5× magnification, remains instantly legible despite the jeweled surroundings.

Powering the watch is a Rolex-certified automatic movement, a self-winding mechanical caliber built and regulated entirely in-house at Rolex's Geneva manufacture. Rolex movements undergo chronometric testing to COSC standards and beyond before receiving Rolex's own Superlative Chronometer certification, ensuring accuracy and reliability that is rare at any price point. The Oyster case, while elegantly slim on the wrist, provides meaningful resistance to the elements.

The five-piece Jubilee bracelet—introduced by Rolex alongside the original Datejust in 1945—is arguably the most sophisticated bracelet in the Rolex catalog, and it is the natural pairing for a diamond-set reference like the 278384RBR. Its alternating polished center links and brushed outer links echo the dual-finish character of the case, and the overall effect on the wrist is one of fluid, jewelry-grade elegance that transitions effortlessly from day to evening wear.

At Bizak & Co., we specialize in sourcing and presenting exceptional pre-owned and unworn Rolex timepieces to discerning collectors across the United States. The Datejust 31 278384RBR in dark grey with diamonds is among the most sought-after references we offer—combining genuine investment appeal with everyday wearability. We invite you to reach out to our team at bizakandco.com to confirm current availability, discuss pricing, and arrange secure, insured shipping. Bizak & Co. is not an authorized Rolex dealer; all Rolex trademarks remain the property of Rolex SA.