Rolex Datejust 31 31 mm 278344RBRWMOPDO Steel/White Gold/Diamonds White Mother of Pearl

The Rolex Datejust is widely regarded as the archetype of the classic Swiss dress watch, and the Datejust 31 reference 278344RBR represents that lineage at its most opulent. Introduced as part of Rolex's intermediate case-size family, the Datejust 31 occupies a sophisticated sweet spot between the 28 mm and 36 mm references, delivering a dial surface that is generous enough to showcase intricate detailing while remaining proportionally elegant on a variety of wrist sizes. Since the original Datejust debuted in 1945 as the world's first self-winding wristwatch to display a date in a magnified window on the dial, the line has stood as a benchmark for Swiss horological excellence, and the 31 mm family continues that tradition with unmistakable authority.

The case of the 278344RBR is a masterclass in material contrast. Rolex constructs it from Oystersteel — the brand's proprietary 904L stainless steel alloy, renowned for its exceptional corrosion resistance and mirror-like polish — combined with 18k white gold components that lift the overall aesthetic into genuine precious-metal territory. The case measures a precise 31 mm in diameter and is water resistant to 100 meters (330 feet), underpinned by the iconic screw-down Twinlock crown and the hermetically sealed Oyster case architecture that Rolex has perfected over decades.

The dial of reference 278344RBR is a showpiece in its own right. White mother-of-pearl is among the most coveted dial materials in haute horology, prized for its natural iridescence — the way it shifts between creamy whites, soft pinks, and silver-grey depending on the light source and viewing angle. Set with diamonds, this dial adds measured sparkle without sacrificing legibility, the interplay of gem brilliance and nacreous shimmer producing an effect that photographs beautifully and captivates even more in person. The 18k white gold domed bezel is set with a continuous band of round brilliant-cut diamonds, framing the dial and unifying the precious-metal theme across every element of the watch.

Power comes from a Rolex-certified automatic movement, the same category of in-house caliber that has driven the Datejust family through decades of reliability and precision. Rolex movements of this generation are chronometer-certified by the Swiss Official Chronometer Testing Institute (COSC) and subsequently subjected to Rolex's own stringent in-house standards, resulting in timekeeping accuracy that consistently surpasses industry norms. The movement winds itself via the Perpetual rotor — a Rolex invention — so the watch keeps running with ordinary daily wear and requires no manual winding under typical conditions.

Completing the package is the Oyster bracelet, arguably the most iconic sports-and-dress bracelet in watch history. Three-link in construction with a polished center link and satin-brushed outer links, the Oyster bracelet on the 278344RBR is produced in matching Oystersteel and white gold, securing the visual coherence of the entire piece. On the wrist, the 31 mm case sits with understated authority — neither too modest nor overpowering — while the diamond bezel and mother-of-pearl dial ensure it reads as genuinely luxurious from across the room.

At Bizak & Co., we curate only the finest examples of collectible and luxury timepieces, and the Rolex Datejust 31 278344RBR is a prime example of why this reference commands enduring demand. Whether you are a first-time Rolex buyer drawn to the magic of mother-of-pearl or a seasoned collector adding a diamond-set mid-size Datejust to a carefully considered wardrobe, this reference delivers on every front. We invite you to reach out to our team at bizakandco.com for availability, pricing, and to begin your acquisition process with confidence.