Patek Philippe ANNUAL CALENDAR CHRONOGRAPH Mode D'emploi page 5

MOVEMENT
• Caliber CH 28-520 IRM QA 24H
• Self-winding
• Flyback chronograph
• Annual Calendar
• Diameter: 33 mm
• Height: 7.68 mm
• Number of parts: 456
• Number of jewels: 40
• Power reserve:
min. 45 hours – max. 55 hours
• Winding rotor:
central rotor in 21K gold,
unidirectional winding
• Balance: Gyromax®
• Frequency:
28,800 semi-oscillations/hour (4 Hz)
• Balance spring: Spiromax®
• Patek Philippe Seal
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DISPLAYS
Hour hand
Minute hand
Chronograph hand (sweep seconds)
Power reserve
Subsidiary dial:
60-minute and 12-hour monocounter
Apertures:
Day of the week
Date
Month
Day/night indication
CROWN
1 Manual winding
2 Setting the time
CORRECTION PUSH PIECES
Day-of-week correction
Date correction
Month correction
PUSHERS
Chronograph start and stop
Chronograph reset and flyback function
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