🔹 Overview
The RL Cosmograph Daytona Ref. 126508-0003 is a prestigious chronograph crafted entirely from 18 ct yellow gold. Featuring a striking bright black dial set with diamonds, golden sub-dials, and a tachymetric bezel, it seamlessly merges the worlds of luxury and motorsport performance. Bold, refined, and unmistakably RL, this Daytona stands as a symbol of both speed and status.

💎 Key Specifications
Reference: 126508-0003
Case: 40 mm Oyster case in 18 ct yellow gold, screw-down back and crown
Bezel: Fixed tachymetric bezel in 18 ct yellow gold, engraved scale up to 400 units/hour
Dial: Bright black with gold accents, diamond-set hour markers in gold settings, Chromalight hands and markers
Crystal: Scratch-resistant sapphire (no Cyclops lens – no date function)
Bracelet: Oyster bracelet in 18 ct yellow gold, three-piece solid links, Oysterlock safety clasp, Easylink 5 mm extension
Movement: RL Calibre 4131, self-winding mechanical chronograph
Functions: Hours, minutes, small seconds; central chronograph seconds; 30-minute counter at 3 o’clock; 12-hour counter at 9 o’clock; stop-seconds
Power Reserve: ~72 hours
Water Resistance: 100 m / 330 ft
Certification: Superlative Chronometer (COSC + RL after casing)

⏱️ Movement
Type: Perpetual, mechanical, self-winding chronograph
Caliber: RL Calibre 4131 Manufacture RL
Features: Column wheel and vertical clutch for precise chronograph function; Chronergy escapement; paramagnetic blue Parachrom hairspring; Paraflex shock absorbers; bidirectional self-winding rotor
Accuracy: −2/+2 seconds per day after casing (Superlative Chronometer)
Power Reserve: Approximately 72 hours

✅ Conclusion
The RL Cosmograph Daytona Ref. 126508-0003 is a masterwork of horological luxury and racing heritage. Its yellow gold construction, diamond-set dial, and professional-grade chronograph functionality make it both a statement piece and a high-performance instrument. With its robust Calibre 4131, 72-hour power reserve, and signature tachymeter bezel, this Daytona embodies the perfect balance of elegance, endurance, and motorsport DNA.