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Reference
126509
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Bracelet
Oyster, three-piece solid links
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Movement
mechanical chronograph, Perpetual, self-winding
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Water Resistant
Waterproof to 100 metres / 330 feet
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Calibre
4131, Manufacture Rolex
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Bezel
Fixed, in 18 ct white gold, with engraved tachymetric scale
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power-reserve
Approximately 72 hours
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Dial
Steel and bright black
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Certification
Superlative Chronometer (COSC + Rolex certification after casing)
The tachymetric scale
With its tachymetric scale, its three counters and its pushers, the Cosmograph Daytona was designed to be the ultimate timing tool for endurance racing drivers. The bezel features a tachymetric scale to read average speed over a given distance based on elapsed time. This scale offers optimal legibility, making the Cosmograph Daytona the ideal instrument for measuring speeds up to 400 units per hour, expressed in kilometres or miles.





