Rolex Daytona 40 mm Black Dial — Key Specs
| Feature | Specification |
|---|---|
| Model Name | Rolex Cosmograph Daytona (40 mm Black Dial) |
| Case Diameter | 40 mm (classic size) |
| Case Material | 904L stainless steel (Oystersteel) |
| Bezel | Tachymeter scale ceramic or steel bezel for measuring speed |
| Crystal | Scratch-resistant sapphire crystal |
| Dial Color | Black with three sub-dials (chronograph) |
| Hour Markers | Applied luminous markers for visibility |
| Hands | Luminous hands (hours, minutes, chronograph) |
| Movement | 7750 |
| Power Reserve | ~72 hours (approx.) |
| Functions | Hours, minutes, small seconds, chronograph (30-min & 12-hr counters) |
| Bracelet | Oystersteel bracelet with solid links |
| Clasp | Oysterlock safety clasp (secure fold-over) |
| Water Resistance | 100 m / 330 ft |
| Certification | Superlative Chronometer (COSC + Rolex tests) |
| Style Category | Professional chronograph sports watch |
