🔹 Overview
The Cosmograph Daytona Ref. M126503-0001 is a chronograph that blends sporty performance with refined elegance. Crafted in a combination of Oystersteel and 18 ct yellow gold, this model features a sleek white dial with gold-toned sub-dials, embodying the spirit of motorsport while maintaining a luxurious aesthetic.

💎 Key Specifications
Reference Number: M126503-0001
Case Size: 40 mm
Case Material: Oystersteel and 18 ct yellow gold
Dial: White with gold chronograph sub-dials, luminous hour markers and hands
Bezel: Fixed 18 ct yellow gold with engraved tachymeter scale
Bracelet: Oyster bracelet in Oystersteel and yellow gold with Oysterlock clasp and Easylink extension
Crystal: Scratch-resistant sapphire with solid screw-down caseback
Water Resistance: 100 m / 330 ft

⏱️ Movement
Caliber: RL Calibre 4131, self-winding automatic chronograph
Chronograph: Central chronograph seconds, 30-minute counter at 3 o’clock, 12-hour counter at 9 o’clock, small seconds at 6 o’clock
Features: Column wheel, vertical clutch, Paraflex shock absorbers, Parachrom hairspring
Frequency: 28,800 vph (4 Hz)
Power Reserve: ~72 hours
Certification: Superlative Chronometer (COSC + RL internal standards, ±2 sec/day)

✅ Conclusion
The RL Cosmograph Daytona M126503-0001 is a luxurious yet functional chronograph, uniting Oystersteel durability with the prestige of 18 ct yellow gold. With its white dial, gold sub-dials, and tachymetric bezel, it remains an icon of motorsport heritage. Backed by the high-precision Calibre 4131 and 100 m water resistance, this Daytona is a statement of both endurance and elegance — equally at home on the racetrack and in refined settings.