Patek Philippe CALIBER CH 29-535 PS Q Mode D'emploi page 11

In 1941,
Patek Philippe had already begun to regu-
larly produce wrist chronographs with perpetual
calendars. Since then, they have ranked among the
most coveted Patek Philippe watches.
The manually wound caliber CH 29-535 PS Q move-
ment combines a perpetual calendar with the
classic chronograph caliber launched in 2009 as
a proprietary development crafted in-house in its
entirety. Its most striking characteristic: it is a har-
monious fusion of tradition and innovation. The
horizontal clutch functions in the conventional
manner with driving, clutch, and chronograph
wheels. But contrary to the traditional triangular
toothing, these three wheels now feature new, pat-
ented profiles that reduce wear, improve efficiency,
and prevent tip-to-tip collisions. Mesh depth is not
adjusted with an eccentric cam as usual but instead
with a large, eccentrically shaped cap on the col-
umn wheel that defines the exact position of the
outermost end of the clutch lever where the high-
est degree of precision can be achieved. Further
optimization measures include self-setting ham-
mers pivoted between jewel bearings, the direct
synchronization of the brake and clutch levers,
and the slotted minute-counter cam that prevents
the abrupt blockage of the chronograph wheel.
With these six innovations, the CH 29-535 PS Q
is the most advanced caliber among all traditional
chronograph movements.
A GRAND CLASSIC
REINTERPRETED
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