Patek Philippe 5950/1 Mode D'emploi page 6

measurements are performed with the two large
sweep stop hands – the chronograph and rat-
trapante hands – and with the small 60-minute
counter at 3 o'clock. Unlike most split seconds
chronographs, the Ref. 5950/1 is a three-phase
chronograph that requires only two pushers.
Actuating the pusher in the winding crown se-
quentially activates the three following com-
mands:
1. Simultaneously start the chronograph and
rattrapante hands,
2. Simultaneously stop the chronograph and
rattrapante hands,
3. Reset the chronograph and rattrapante hands.
The pusher at 2 o'clock controls only the rattrapante hand.
MeASURING DURAtIONS AND StOppING LAp tIMeS
When the event to be timed begins, actuate the
pusher in the winding crown: The superposed
chronograph and rattrapante hands begin to run.
To measure a lap time, press the pusher at 2
o'clock: The rattrapante 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 rattrapante hand
will catch up with the chronograph hand and
both hands, now superposed, will continue run-
ning. 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 rattrapante
hands will both return to zero.
Caution: To reset the chronograph and rattrapante hands
to zero at the same time, they must be superposed. If the rat-
trapante 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.
SAVING A ReFeReNCe tIMe
Actuate the pusher in the winding crown to si-
multaneously start the chronograph and rattra-
pante hands. To save a reference time, actuate the
pusher at 2 o'clock; the rattrapante hand will stop
at the reference time. Actuate the pusher in the
winding crown twice in succession to stop and
reset the chronograph hand. The rattrapante hand
will stay at the reference time. From now on, you
can use the pusher in the winding crown as often
as you wish to perform measurements with the
chronograph hand and compare them with the
reference time indicated by the rattrapante hand.
After completion of the time measurements, ac-
tuate the pusher at 2 o'clock to cause the rat-
trapante hand to catch up with the chronograph
hand. Now, you can reset both hands to zero with
the pusher in the winding crown.
Note: Thanks to their newly developed toothing profile,
the chronograph wheels of the Ref. 5950/1 are much more
wear-resistant than conventional wheels with triangular
teeth. However, you can further avoid unnecessary wear by
using the chronograph and rattrapante hands only for tim-
ing events rather than keeping them running permanently.