Rolex Daytona 40 mm Black Dial — Key Specs
| Feature | Specification |
|---|---|
| Model Name | Rolex Cosmograph Daytona (40 mm Black Dial) |
| Case Diameter | 40 mm (classic Daytona size) |
| Case Material | Stainless steel (Oystersteel in modern versions) |
| Bezel | Tachymeter scale bezel (steel or Cerachrom ceramic on newer models) |
| Crystal | Scratch-resistant sapphire crystal |
| Dial Color | Black with three chronograph subdials |
| Hour Markers | Applied luminous markers for legibility |
| Hands | Luminous hands for hours, minutes, small seconds and chronograph counters |
| Movement | Automatic chronograph (Rolex Cal. 4130 in modern versions) |
| Power Reserve | Approx. 72 hours (modern Rolex chronograph movements) |
| Functions | Hours, minutes, small seconds, chronograph (30-min & 12-hr), center chronograph seconds |
| Bracelet | Oyster bracelet with solid links |
| Clasp | Oysterlock safety clasp (folding with Easylink adjustment on real Rolex) |
| Water Resistance | 100 m / 330 ft |
| Style Category | Professional chronograph sports watch |
