Patek Philippe CALIBRE CH 28-520 IRM QA 24H Mode D'emploi page 22

22
specifications of the movement
self-winding mechanical movement
caliber ch 28-520 irm Qa 24h
DIAMETER
HEIGHT
NUMBER OF PARTS
NUMBER OF JEWELS
POWER RESERVE
WINDING ROTOR
BALANCE SPRING
FREQUENCY
BALANCE
HALLMARK
displays
hours, MinuTes
sweeP seconds hand (chronograPh hand)
60-MinuTe and 12-hour counTer aT 6 o'clock
ANNUAL CALENDAR WITH APERTURE DISPLAYS
– day of week at 10 o'clock
– date at 12 o'clock
– Month at 2 o'clock
day / nighT indicaTor aT 6 o'clock
Power-reserve indicaTor aT 12 o'clock
correction push pieces (in the case flank)
day aT 9 o'clock
daTe beTween 9 and 10 o'clock
MonTh aT 10 o'clock
Buttons
chronograPh sTarT and sToP aT 2 o'clock
chronograPh reseT and Flyback aT 4 o'clock
33 mm
7.68 mm
456
40
Min. 45 hours - max. 55 hours
central rotor in 21k gold,
unidirectional winding
gyromax
®
28,800 semi-oscillations/hour (4 hz)
spiromax
®
Patek Philippe seal