Family: xx32 jewels50h power reserve28,800 vph (4 Hz)
The CH 28 520 is a movement caliber manufactured by Patek Philippe. It is used to power the chronograph function in the Rainbow on the wrist model.
Last updated 7 Oct 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Jewel Count
32 jewels
Power Reserve
50h
Frequency
28,800 vph (4 Hz)
Diameter
30mm
Height
5.3mm
Display Type
Analog
QUICK FACTS
BRAND
TYPE
AutomaticSTATUS
In ProductionMANUFACTURE
In-houseCALIBER FAMILY
xxCOUNTRY
SwitzerlandALSO KNOWN AS
cal. CH 28 520
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