The ref. 6240 represents a pivotal moment in the history of Rolex's iconic Daytona. Produced as a test for waterproofing chronographs, the 6240 is notable for its rarity—fewer than 2,000 examples were made—and its distinctive design elements. This reference laid the foundation for future Daytona models by introducing screw-down pushers for enhanced waterproofing, setting a standard for the line. Unique among hand-wound Daytonas, the 6240 has no gold counterpart, adding to its allure. Rolex introduced this model two years after the first Daytona, and collectors can find variations: some 6240 dials proudly feature the word "Oyster" to denote the waterproof case, while others are without. The variant presented here is a "small floating Daytona," named for its smaller “Rolex Cosmograph Daytona” text, which gives the dial an expansive feel. Adding to its charm, the lume plots extend over the “T-Swiss-T” text at 6 o'clock, creating an illusion of deeper subdials. This example features the original Mk1 pushers and bezel, complemented by a riveted, spring-loaded Oyster bracelet (ref. 6635) with rare end links marked 71 and a clasp stamped ‘1 66.’ Powering this piece is the Caliber 722 manual-wind movement, fully serviced for optimum performance. For Daytona aficionados, the 6240 offers a dive into Rolex history and a piece of truly masculine design. Contact us for more information on this collector’s gem. Specifications: - Black "small floating" dial- 14XXXXX serial dating to 1966- Caliber 722 manual-wind movement, based on the Valjoux 72- Mk1 pushers and Mk1 Bakelite bezel- Spring-loaded Oyster bracelet ref. 6635 with rare 71 end links- Fully serviced by our watchmaker- One-year mechanical warranty