Rolex introduced the Cosmograph in 1963 and named it for Daytona Beach in Florida, laying it out as a driver's instrument with three counters and a tachymetric scale on the bezel for reading average speed over a measured distance. Screw down pushers arrived on reference 6240 in 1965, sealing the chronograph into the Oyster case. The movement went from hand wound to an automatic based on the Zenith El Primero in 1988, to Rolex's own calibre 4130 in 2000 and the calibre 4131 in 2023. The case grew from 37 mm on the first series to 40 mm with that 1988 generation and has stayed there since, in steel, gold and platinum.
How you know it
- tachymetric scale on the bezel
- three counters at 3, 6 and 9
- screw down pushers
- no date window
Sizes in the family
40 mm across the current line, 37 mm on the first series references
Who it suits
For a buyer who wants a chronograph rather than a dress watch, and who is choosing on metal rather than on case size.
Cosmograph Daytona in stock
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