The Cosmograph Daytona, introduced in 1963, was designed to meet the demands of professional racing drivers. With its highly reliable chronograph and bezel with tachymetric scale, it allows drivers to perfectly measure average speeds up to 400 kilometres or miles per hour, as they choose. An icon eternally joined in name and function to the high‑performance world of motor sport.
| Movement | Winding |
| Mechanical and self-winding | Bidirectional, automatic |
| Functions | Calibre |
| 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 | 4130 Calibre, Manufactured by Rolex |
| Water-Resistance | Oyster Architecture |
| Waterproof to 100 metres / 330 feet | Monobloc middle case, screw-down case back and winding crown |
![C-MAP 4D NA-D930 Lake Superior [NA-D930]](https://www.wristgemz.shop/image/c-map-4d-na-d930-lake-superior-na-d930_MeERBz_300x.webp "C-MAP 4D NA-D930 Lake Superior [NA-D930]")
