Rolex Cosmograph Daytona 40 Ref. 126509-0002
18 ct White Gold – Tachymeter Bezel – Bright Black & Steel Dial with Diamond Hour Markers – Oyster Bracelet
Overview
The Rolex Cosmograph Daytona Ref. 126509-0002 is the ultimate expression of endurance, performance, and prestige. Introduced in 1963, the Cosmograph Daytona was created to meet the demands of professional racing drivers. Today, it has transcended the track to become one of the most coveted timepieces in the world, combining Rolex’s watchmaking mastery with timeless design.
This reference is crafted entirely from 18 ct white gold, a noble metal that radiates subtle sophistication. Its bright black dial with contrasting steel sub-dials enhances legibility while maintaining a sporty yet elegant aesthetic. Adding to its brilliance, diamond-set hour markers elevate the watch with a luxurious sparkle, while the Chromalight display ensures exceptional visibility in the dark.
Encircling the dial is a fixed 18 ct white gold bezel engraved with a tachymetric scale, enabling precise speed measurements — a defining feature of the Daytona. The robust 40 mm Oyster case is equipped with a Triplock triple waterproofness system, guaranteeing water resistance up to 100 meters, while the screw-down pushers preserve chronograph reliability.
The watch is fitted with the legendary Oyster bracelet, crafted from solid white gold links, offering a perfect blend of comfort, strength, and refinement. Its Oysterlock folding clasp with the Easylink 5 mm comfort extension link ensures a secure and tailored fit.
Inside beats the new-generation Rolex Calibre 4131, entirely developed and manufactured in-house. This self-winding mechanical chronograph movement features a Parachrom hairspring for resistance to shocks and magnetism, Paraflex shock absorbers for enhanced robustness, and an impressive power reserve of approximately 72 hours. Certified as a Superlative Chronometer, the 4131 delivers accuracy within −2/+2 seconds per day, setting a benchmark in Swiss precision.
More than just a chronograph, the Cosmograph Daytona 126509-0002 is a symbol of Rolex excellence — a watch that embodies sporting heritage, luxury, and timeless prestige.
Key Specifications
| Feature | Details |
|---|---|
| Reference | 126509-0002 |
| Case | Oyster, 40 mm, 18 ct white gold |
| Bezel | Fixed, engraved tachymetric scale, 18 ct white gold |
| Dial | Bright black with steel sub-dials, diamond hour markers |
| Crystal | Sapphire, scratch-resistant |
| Bracelet | Oyster (flat three-piece links), 18 ct white gold |
| Clasp | Folding Oysterlock safety clasp with Easylink 5 mm extension |
| Movement | Rolex Calibre 4131, automatic chronograph |
| Power Reserve | ~72 hours |
| Features | Parachrom hairspring, Paraflex shock absorbers, COSC + Rolex certification |
| Functions | Hours, minutes, small seconds; central chronograph seconds; 30-minute counter (3h); 12-hour counter (9h); stop-seconds |
| Water Resistance | 100 m / 330 ft |
Conclusion
The Rolex Cosmograph Daytona 40 Ref. 126509-0002 is more than a professional racing chronograph — it is a statement of prestige and timeless sophistication. Its diamond-set dial, full 18 ct white-gold construction, and legendary Calibre 4131 movement embody the perfect fusion of luxury and performance.
Built to last a lifetime, this Daytona is as much a tool for precision as it is a symbol of style and success. For collectors and connoisseurs, the 126509-0002 is not merely a watch — it is a legacy, an icon to treasure and pass down through generations.
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