Patek Philippe AQUANAUT LUCE CHRONOGRAPH Mode D'emploi page 4

To accompany every instant of an active life,
Patek Philippe has endowed your timepiece with
the caliber CH 28-520 – a self-winding flyback
chronograph movement epitomizing the union of
tradition and innovation. It combines classic col-
umn-wheel control with the modern, vertical disk
clutch that prevents hand bounce and rebound when
starting the chronograph. Because this clutch is vir-
tually friction-free, the sweep chronograph hand
can also be used as a continuously running second
hand. This eliminates the need for a seconds subdial.
Thanks to the flyback function, the owner can actu-
ate the pusher to initiate a new measurement while
the chronograph hand is running, which makes a
reset superfluous. The transition from the chron-
ograph to the running seconds function allows the
watch to be synchronized with a time signal using
the stop seconds feature. The large monocounter that
dominates the lower half of the dial ensures a highly
legible display of the 60 minutes of elapsed times.
On the CH 28-520 C caliber these indications are
completed with an aperture for the date at 3 o'clock
with instant change in a fraction of a second.
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