THE TACHYMETRIC SCALE
HIGH-PERFORMANCE CHRONOGRAPH
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.
MODEL CASE
MODEL CASE
- Oyster, 40 mm, Everose gold
OYSTER ARCHITECTURE
- Monobloc middle case, screw-down case back and winding crown
DIAMETER
- 40 mm
MATERIAL
- 18 ct Everose gold
BEZEL
- Fixed, with engraved tachymetric scale, in 18 ct Everose gold
WINDING CROWN
- Screw-down, Triplock triple waterproofness system
CRYSTAL
- Scratch-resistant sapphire
WATER RESISTANCE
Waterproof to 100 metres / 330 feet
MOVEMENT
MOVEMENT
- Perpetual, mechanical chronograph, self-winding
CALIBRE
- 4130, Manufacture Rolex
PRECISION
- -2/+2 sec/day, after casing
FUNCTIONS
- Centre hour, minute and seconds hands, small seconds hand at 6 o’clock. Chronograph (centre hand) accurate to within 1/8 of a second, 30-minute counter at 3 o’clock and 12-hour counter at 9 o’clock. Stop seconds for precise time setting
OSCILLATOR
- Paramagnetic blue Parachrom hairspring
WINDING
- Bidirectional self-winding via Perpetual rotor
POWER RESERVE
Approximately 72 hours
BRACELET
BRACELET
- Oyster, flat three-piece links
BRACELET MATERIAL
- 18 ct Everose gold
CLASP
Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link
DIAL
DIAL
- Sundust and black
DETAILS
Highly legible Chromalight display with long-lasting blue luminescence
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