Self-winding mechanical movement. Caliber AL 30-660 S C FUS. Alarm time displayed in an aperture. Alarm on/off indication in an aperture. 24-hour alarm. Alarm on/off and day/night indication. Two time zones: local and home time indication. Day/night indication for local and home time. Local date. Sweep seconds hand. Diameter: 31 mm. Height: 6.6 mm. Parts: 574. Jewels: 52. Power reserve: min. 42 hours – max 52 hours. Central rotor in 21K gold, unidirectional winding. Balance: Gyromax®. Semi-oscillation/hour: 28 800 (4 Hz). Balance spring: Spiromax®. Hallmark: Patek Philippe Seal.