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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
- Oyster, 40 mm, Everose gold
- Monobloc middle case, screw-down case back and winding crown
- 40 mm
- 18 ct Everose gold
- Fixed, with engraved tachymetric scale, in 18 ct Everose gold
- Screw-down, Triplock triple waterproofness system
- Scratch-resistant sapphire
Waterproof to 100 metres / 330 feet
MOVEMENT
- Perpetual, mechanical chronograph, self-winding
- 4130, Manufacture Rolex
- -2/+2 sec/day, after casing
- 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
- Paramagnetic blue Parachrom hairspring
- Bidirectional self-winding via Perpetual rotor
Approximately 72 hours
BRACELET
- Oyster, flat three-piece links
- 18 ct Everose gold
Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link
DIAL
- Sundust and black
Highly legible Chromalight display with long-lasting blue luminescence
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