Patek Philippe 5372 Mode D'emploi page 6

Caution: Please set the time only when the chronograph
is stopped and the chronograph and rattrapante hands both
return to zero, and preferably – to prevent lateral pressure
on the winding stem – before you put the watch on. We
recommend that you turn the crown only with two fingers
and use your fingernails to pull it out.
CHRONOGRAPH
The Patek Philippe split-seconds chronograph
allows you to measure the duration of events
or record lap times. These measurements are
performed with the two large sweep stop hands –
the chronograph and split-seconds hands – and with
the small 60-minute counter at 3 o'clock. Unlike
most split-seconds chronographs, the Ref. 5372 is
a three-phase chronograph that requires only two
pushers. Actuating the pusher in the winding crown
sequentially activates the three following commands:
1. Simultaneously start the chronograph and
split-seconds hands,
2. Simultaneously stop the chronograph and
split-seconds hands,
3. Reset the chronograph and split-seconds hands.
The pusher at 2 o'clock controls only the split-seconds hand.
MEASURING DURATIONS AND STOPPING LAP TIMES
When the event to be timed begins, press the pusher
in the winding crown: The superposed chronograph
and split-seconds hands begin to run. To measure
a lap time, press the pusher at 2 o'clock: The split-
seconds hand will stop but the chronograph hand
keeps running. Now you can take a note of the lap
time. When you actuate the pusher at 2 o'clock
again, the split-seconds hand will catch up with the
chronograph hand and both hands, now superposed,
will continue running. This function can be activated
as many times as you wish. To stop the final time,
actuate the pusher in the winding crown: this will
stop the chronograph hand and you can take a note
of the duration of the event. When you actuate the
pusher in the winding crown again, the chronograph
and split-seconds hands will both return to zero.
Caution: To reset the chronograph and split-seconds hands
to zero at the time time, they must be superposed. If the split-
seconds hand is still indicating a lap time, actuate the pusher
at 2 o'clock to make it catch up with the chronograph hand,
and then reset both hands to zero by actuating the pusher in
the winding crown.