Patek Philippe caliber CH 28-520 IRM QA 24H

Patek Philippe caliber CH 28-520 IRM QA 24H

Ref. CH 28-520 IRM QA 24H

The Patek Philippe caliber CH 28-520 IRM QA 24H is an automatic movement with a 55-hour power reserve, beats at 28,800 vph, and carries 40 jewels.

The CH 28-520 IRM QA 24H was Patek's first in-house selfwinding chronograph movement.

Type
Automatic
Display
Analog
Power reserve
55 h
Frequency
28800 vph
Jewels
40
Diameter
33 mm
Complications
Annual Calendar, Chronograph, Column wheel, Date, Day, Day, Flyback, Hours, Minutes, Month, Night Indication, Power Reserve Indicator

Variants

1
CH 28-520 QA 24H

Used in

17 models