Self-winding
28-520
This self-winding flyback chronograph caliber features a distinctive 60-minute counter at 6 o'clock. It can also be combined with additional complications such as the World Time or the patented Patek Philippe Annual Calendar.
CH 28-520
Features: Flyback chronograph. Central chronograph hand. 60-minute counter. Diameter: 30 mm. Thickness: 5.3 mm. Number of parts: 259. Number of jewels: 32. Power reserve: min. 50 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Balance spring: Spiromax®. Distinctive sign: Patek Philippe Seal.
CH 28-520 C/522
Features: Flyback chronograph. Central chronograph hand. 60-minute and 12-hour monocounter. Date in an aperture. Diameter: 30 mm. Thickness: 6.63 mm. Number of parts: 327. Number of jewels: 35. Power reserve: min. 45 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Balance spring: Spiromax®.
CH 28-520 C/528
Features: Flyback chronograph. Central chronograph hand. 60-minute counter. Date in an aperture. Diameter: 30 mm. Thickness: 6.63 mm. Number of parts: 308. Number of jewels: 32. Power reserve: min. 45 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Balance spring: Spiromax®.
CH 28-520 C FUS
Features: Flyback chronograph. Central chronograph hand. 60-minute counter. Two time zones: local and home time indication. Day/night indication for local and home time in apertures. Date coupled with local time by hand. Diameter: 31 mm. Thickness: 6.95 mm. Number of parts: 370. Number of jewels: 34. Power reserve: min. 45 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Balance spring: Spiromax®.
CH 28-520 HU/524
Features: Flyback chronograph. Central chronograph hand. 30-minute counter. World Time. 24-hour and day/night indication for all 24 time zones. Diameter: 33 mm. Thickness: 7.97 mm. Number of parts: 355. Number of jewels: 36. Power reserve: min. 50 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Balance spring: Spiromax®. Distinctive sign: Patek Philippe Seal.
CH 28-520 HU/530
Features: Flyback chronograph. Central chronograph hand. 30-minute counter. World Time. 24-hour and day/night indication for all 24 time zones. Diameter: 34.5 mm. Thickness: 8 mm. Number of parts: 355. Number of jewels: 36. Power reserve: min. 50 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Balance spring: Spiromax®. Distinctive sign: Patek Philippe Seal.
CH 28-520 IRM QA 24H
Features: Flyback chronograph. Central chronograph hand. 60-minute and 12-hour monocounter. Annual Calendar. Day, date and month in apertures. Power reserve indication. Diameter: 33 mm. Thickness: 7.68 mm. Number of parts: 456. Number of jewels: 40. Power reserve: min. 45 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Balance spring: Spiromax®. Distinctive sign: Patek Philippe Seal.
CH 28-520 QA 24H
Features: Flyback chronograph. Central chronograph hand. 60-minute counter. Annual Calendar. Day, date, month and day/night indication in aperture. Diameter: 33 mm. Thickness: 7.68 mm. Number of parts: 402. Number of jewels: 37. Power reserve: min. 45 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Balance spring: Spiromax®.
