Rolex Daytona Cosmograph M126503-0001

Tachymetric Scale

• Function: The bezel features a tachymetric scale for measuring average speeds over a given distance based on elapsed time. This scale ensures optimal legibility, making the Cosmograph Daytona ideal for measuring speeds up to 400 units per hour, in kilometers or miles.

White Dial

• Features:
  • Color: White
  • Details: Snailed chronograph counters, 18 ct gold applique hour markers, and hands with a Chromalight display for high legibility.
  • Functions:
    • Central Sweep Seconds Hand: Allows accurate reading of 1/8 second.
    • Counters: Two counters display elapsed time in hours and minutes, aiding in precise track timing and tactical planning.

Yellow Rolesor

• Composition: A combination of Oystersteel and yellow gold.
• Properties: Rolesor blends the lustre and nobility of gold with the strength and reliability of steel. Trademarked by Rolex in 1933, Rolesor is a signature feature of the Oyster collection.

The Oyster Bracelet

• Design: Known for its robustness and comfort, the Oyster bracelet features broad, flat three-piece links. Introduced in the late 1930s, it remains a staple of the Oyster collection.
• Production: Combines advanced technology with aesthetic controls to ensure both form and function.

4131 Movement

• Calibre: 4131, a new-generation chronograph movement developed entirely by Rolex.
• Performance:
  • Chronograph Function: Features a reduced number of components for enhanced reliability.
  • Mechanism: Includes a column wheel and vertical clutch for precise and instantaneous operation.
  • Decoration: The movement's bridges have Rolex Côtes de Genève decoration with a polished groove between each band.
• Power Reserve: Approximately 72 hours.

Technical Details

• Dial: White, with a highly legible Chromalight display.
• Case:
  • Type: Oyster
  • Diameter: 40 mm
  • Material: Yellow Rolesor (combination of Oystersteel and yellow gold)
  • Bezel: Fixed, with engraved tachymetric scale in yellow gold.
  • Winding Crown: Screw-down, Triplock triple waterproofness system.
  • Crystal: Scratch-resistant sapphire.
  • Water Resistance: Waterproof to 100 metres / 330 feet.
• Movement: Perpetual, mechanical chronograph, self-winding.
• Bracelet:
  • Type: Oyster, three-piece solid links.
  • Material: Yellow Rolesor (combination of Oystersteel and yellow gold).
  • Clasp: Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link.