38 jewels28,800 vph (4 Hz)
Caliber CH-28-520-HU is a self-winding movement from Patek Philippe combining a chronograph with world time functionality displaying 24 time zones. It measures 33mm in diameter and 7.91mm thick, operates at 28,800 vph (4 Hz), and contains 38 jewels. The movement features Gyromax® balance and Spiromax® hairspring, bearing the Patek Philippe Seal hallmark. It powers watches such as the World Time Chronograph 5930 and 5935.
Last updated 29 Apr 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Jewel Count
38 jewels
Frequency
28,800 vph (4 Hz)
Diameter
33mm
Height
7.91mm
Display Type
Analog
COMPLICATIONS
Chronograph30-Minute CounterWorld Time
FEATURES
Hand Winding
QUICK FACTS
FOR WATCH DEALERS
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