Rolex Cosmograph Daytona 40mm Ref# 126503-0003

Rolex Cosmograph Daytona – M126503-0003
Nickname: “Daytona” – Iconic chronograph for motorsport enthusiasts

🧭 Key Features:
Case Size: 40 mm
Material: Rolesor (combination of Oystersteel and 18 ct yellow gold)
Bezel: Yellow gold Cerachrom bezel with tachymetric scale, highly scratch-resistant ceramic
Crystal: Scratch-resistant sapphire
Water Resistance: 100 meters / 330 feet

⌚ Dial:
Color: White lacquered dial
Hour Markers: Yellow gold hour markers filled with Chromalight luminescence (long-lasting blue glow)
Hands: Yellow gold hands with Chromalight display
Chronograph Counters: 30-minute counter at 3 o’clock, 12-hour counter at 9 o’clock, small seconds at 6 o’clock

🧵 Bracelet/Strap:
Type: Oyster bracelet (three-piece solid links – sporty and robust)
Material: Rolesor (Oystersteel and 18 ct yellow gold)
Clasp: Oysterlock safety clasp with Easylink 5 mm comfort extension

⚙️ Movement:
Calibre: Rolex 4130, self-winding mechanical chronograph movement
Functions:

• Central hour, minute, and seconds hands

• Chronograph: 30-minute and 12-hour counters

• Small seconds sub-dial

• Stop-seconds for precise time setting
  Power Reserve: Approximately 72 hours
  Certification: Superlative Chronometer (COSC + Rolex in-house testing)