

Nautilus - 30 mm
Chronograph, Date.
- Rose gold. Screw-down crown. Sapphire-crystal case back. Water-resistant to 120m. Case diameter (10-4 o’clock): 40.5 mm. Height: 12.2 mm.
- Mechanical self-winding movement with date. Caliber CH 28‑520 C.
- Gold bracelet. Nautilus fold-over clasp.
- Dial: black gradient, gold applied hour markers with luminescent coating.
CH 28-520 C/522
Self-winding
Chronograph with 60-minute and 12-hour mono-counter. Date. Diameter: 30 mm. Height: 6.63 mm. Bridges: 13. Jewels: 35. Power reserve: min. 45 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Vibrations/hour: 28 800 (4 Hz). Balance spring: Spiromax®. Hallmark: Patek Philippe Seal. Parts: 327.