The Rolex Cosmograph Daytona reference 126599TSA is an ultra-exclusive, off-catalog timepiece that represents a pinnacle of the brand’s gem-setting expertise. Introduced around 2025, this model features a 40mm case meticulously crafted from 18k white gold. Its most defining characteristic is the bezel set with 36 baguette-cut blue sapphires, which is complemented by 54 brilliant-cut diamonds adorning the lugs and crown guards. The dial is made from silver sheen obsidian, a rare volcanic glass that provides a unique, iridescent texture, and features hour markers set with matching blue sapphires.
Technically, the watch is powered by the Rolex manufacture caliber 4131, a self-winding mechanical chronograph movement that offers a power reserve of approximately 72 hours. The complication suite includes a central chronograph seconds hand, a 30-minute counter at the 3 o’clock position, and a 12-hour counter at 9 o’clock. Designed for both durability and luxury, the watch is equipped with a screw-down crown and Triplock triple waterproofness system, ensuring a water resistance of 100 meters. It is presented on a solid 18k white gold Oyster bracelet featuring the Oysterlock safety clasp and Easylink comfort extension.
General reviews of the 126599TSA emphasize its status as a collector’s masterpiece, often describing it as a “grail” watch due to its rarity and the artisanal quality of its materials. While enthusiasts praise the mesmerizing depth of the obsidian dial and the vibrant gradient of the sapphires, some critics within the horological community note that its highly decorative aesthetic shifts it more toward the realm of high jewelry than a traditional professional sports tool. Despite this, the model is widely lauded for maintaining the technical integrity and precision of the Daytona lineage while offering an unparalleled level of opulence.