Rolex Cosmograph Daytona 40 mm 116523BLKD Steel/Yellow Gold Luminous

The Rolex Cosmograph Daytona is one of the most iconic sports watches ever conceived, born from Rolex's deep association with motorsport and designed from the outset as the professional tool of racing drivers. Introduced decades ago and continuously refined, the Daytona has become the definitive chronograph reference in both watchmaking and collecting circles, celebrated for its legibility, robustness, and enduring desirability. Reference 116523BLKD occupies a particularly coveted position within the Daytona family, blending two-tone Rolesor construction with extraordinary decorative detail.

The case measures 40mm in diameter and is built from Oystersteel paired with 18k yellow gold—an alloy combination Rolex calls Rolesor. This pairing delivers the durability and corrosion resistance of steel alongside the warmth and prestige of solid gold, making it a versatile choice that flatters a wide range of styles. The screw-down crown and caseback, hallmarks of the Oyster case, give the watch its characteristic robustness and resistance to the elements.

The defining visual statement of the 116523BLKD is its black luminous dial set with diamonds. The deep, rich black registers and chapter ring create dramatic contrast, while the diamond hour markers elevate the watch from sports instrument to genuine jewel. Luminous material on the hands and markers ensures legibility in low light, honoring the Daytona's roots as a professional timing tool even as the gem-setting pushes it into luxury territory.

The bracelet is an Oyster design executed in steel and yellow gold and set with diamonds, continuing the gem theme from the dial all the way to the wrist. This full integration of diamonds across both dial and bracelet is what separates the 116523BLKD from standard two-tone Daytona references, giving the watch a cohesive high-jewelry sensibility that is rare in a mechanical sports chronograph. The screw-down tachymeter bezel frames the dial with purposeful elegance, a nod to the watch's chronograph heritage.

Powering the watch is an automatic movement housed within the Oyster case—a self-winding mechanical caliber consistent with Rolex's reputation for precision and long-term reliability. Rolex's commitment to in-house manufacturing means that every component meets exacting standards, and the movement benefits from the same quality controls applied across the brand's entire professional range.

Bizak & Co. is an independent luxury watch dealer specializing in pre-owned and rare Rolex timepieces, including hard-to-find references like the 116523BLKD. Purchasing through Bizak & Co. gives collectors access to expertly sourced watches with transparent descriptions and dedicated personal service. Browse our current inventory at bizakandco.com or reach out directly to our team to discuss the Rolex Cosmograph Daytona 116523BLKD, ask questions, and buy with confidence. Please note that Bizak & Co. is not an authorized Rolex dealer.