Rolex Datejust 31 31 mm 278384RBRAO Steel/White Gold/Diamonds Aubergine Rolex Datejust 31 31 mm 278384RBRAO Steel/White…

The Rolex Datejust 31 is one of the most enduring and recognizable watch references in horological history. Introduced as an evolution of the original Datejust—the first self-winding wristwatch to display the date in a window at 3 o'clock—the 31mm case size has long served as Rolex's definitive mid-size expression, sitting confidently between the ladies 28mm and the full-size 36mm offerings. Reference 278384RBRAO represents the current-generation Datejust 31, incorporating the refined proportions and finishing standards that Rolex has perfected over decades of continuous production.

The case of the 278384RBRAO is constructed from a harmonious combination of Oystersteel—Rolex's proprietary 904L stainless steel alloy prized for its exceptional corrosion resistance and mirror-like polish—and 18k white gold. White gold accents appear on the bezel setting and crown, lending the watch an elevated, jewel-like character without abandoning the sporting robustness for which Rolex Oyster cases are renowned. The Oyster case is water resistant to 100 meters (330 feet), sealed by a screw-down Triplock crown.

The defining visual element of this reference is its aubergine dial—a sophisticated deep purple-burgundy tone that occupies a rare position in the Datejust color palette. Aubergine dials are prized by collectors for their chameleon-like quality: appearing as a rich plum in warm light and shifting toward a darker, more mysterious hue in shadow. The Roman VI diamond index adds a focal point of brilliance at the six o'clock position, reinforcing the luxurious character of the piece. The diamond-set bezel frames the dial in a continuous arc of pavé-set brilliant-cut diamonds, elevating this Datejust into genuine haute horlogerie territory.

Powering the 278384RBRAO is a Rolex automatic movement, regulated to Rolex's exacting chronometric standards and certified as a Superlative Chronometer, guaranteeing precision of plus or minus two seconds per day once serviced and certified by Rolex. The movement is housed within the iconic Oyster case, protecting the caliber from dust, pressure, and moisture. The Oyster bracelet—with its characteristic flat three-piece link design—completes the watch with the same architectural clarity as the case, secured by Rolex's Oysterclasp for a refined and secure fit.

At 31mm, the Datejust 278384RBRAO occupies a versatile sweet spot on the wrist. It wears with equal authority on a formal occasion—paired with an evening gown or tailored suit—and offers understated refinement for everyday wear, thanks to the rugged Oyster architecture beneath its jeweled exterior. For buyers seeking a Datejust that transcends the ordinary steel or two-tone configurations, the aubergine diamond dial and diamond bezel combination of this reference is among the most compelling in the current lineup.

At Bizak and Co., we specialize in sourcing exceptional Rolex timepieces for discerning buyers across the United States. The Datejust 31 ref. 278384RBRAO is available for purchase online at bizakandco.com, and our team is ready to answer your questions, provide additional photos, or assist with acquisition. Please note that Bizak and Co. is not an authorized Rolex dealer; all watches are sold on the secondary market. Reach out today to add this rare aubergine Datejust 31 to your collection.