CH 28-520 IRM QA 24H

AUTOMATIC • Analog • Chronograph: Chronograph, Column wheel, Flyback Hands: Day / Night Indication, Hours, Minutes Power Reserve Indicator

Jewels

Reserve

55 h

Frequency

28,800 vph (4.0 Hz)

Diameter

33 mm

Height

About this caliber

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

Movement: AUTOMATIC
Display: Analog
Jewels: 40
Power reserve: 55 hours
Frequency: 28,800 vph (4.0 Hz)
Hands: Chronograph: Chronograph, Column wheel, Flyback Hands: Day / Night Indication, Hours, Minutes Power Reserve Indicator
Diameter: 33 mm
Height: -
Parts: -