Rolex Datejust 31 31 mm 278344RBRBKRO Steel/White Gold/Diamonds Black

The Rolex Datejust is one of the most enduring and recognizable watch designs in horology, first introduced in 1945 as the first self-winding wristwatch to display the date in a window at 3 o'clock. Over the decades the Datejust has evolved into a full family of references spanning multiple case sizes, and the 31mm configuration occupies a refined middle ground — substantial enough to read clearly on the wrist yet elegantly proportioned for a wide range of wearers. Reference 278344RBR represents one of the most beautifully appointed iterations of this storied line, pairing luxurious materials with Rolex's signature engineering discipline.

The 31mm Oyster case of the 278344RBR is constructed in a combination of Rolex's proprietary Oystersteel — a 904L stainless steel alloy prized for its exceptional corrosion resistance and brilliant polish — and 18k white gold, giving the watch a two-tone character that feels simultaneously sporty and refined. The case is water resistant to 100 meters (330 feet) thanks to the screwed-down Oyster crown and the robust architecture that has defined Rolex tool watches for generations, ensuring this piece is as capable as it is beautiful.

The dial is a bright black with Roman numeral hour markers, a choice that injects classical formality into the design and pays homage to the Datejust's long heritage as a dress watch. Roman numerals have graced Datejust dials for decades, lending a sense of tradition and legibility that Arabic indices cannot quite replicate. The deep black ground creates a dramatic backdrop that makes the white gold and diamond-set surroundings shimmer all the more intensely.

The 18k white gold domed bezel set with diamonds is the defining jewel of this reference. Rolex's gem-setting workshops apply rigorous standards of symmetry and brightness to every diamond used on the brand's timepieces, and the result on the 278344RBR is a bezel that catches light from every angle without ever feeling ostentatious. The Oyster bracelet — one of Rolex's most iconic and comfortable bracelets — completes the look, its alternating polished and satin-finished links harmonizing perfectly with the steel and white gold tones of the case. An automatic movement inside ensures the watch keeps time with the precision and reliability Rolex is globally renowned for.

For collectors and enthusiasts searching to buy a Rolex Datejust 31 278344RBR online, Bizak & Co. offers the expertise and personal attention that this caliber of timepiece deserves. Our team is available to answer questions about the watch's specifications, provenance, and condition, and to guide you through a purchase with the confidence that comes from dealing with seasoned watch professionals. Reach out to Bizak & Co. at bizakandco.com to inquire about this reference today.