Patek Philippe 240 Mode D'emploi page 7

INSTRUCTIONS
7
winding crown
The winding crown is used to wind the watch,
correct the date, and set the time.
winding
Your watch incorporates a self-winding movement.
The movements of your wrist set a centrifugal mass
in motion; this tensions the mainspring which
stores the energy. When you take off your fully
wound watch, it will continue to run for at least
35 hours. When it has stopped after depleting the
power reserve, it can be rewound by hand (about
10 clockwise turns of the crown). Please wind the
watch before you put it on. This way, you can avoid
lateral pressure on the winding stem which in the
course of the years could damage the stem tube.
setting the time
To set the time, gently pull the winding crown all
the way out and turn it clockwise or counterclock-
wise. If your watch has a date display, do not move
the hands counterclockwise beyond midnight. This
would not damage the movement but it would
require a correction of the date. Once the hands
are set to the correct time, push the crown all the
way home again.
If your watch has a screw-down crown, it must
be unscrewed before you can set the time or the
date. When it is unscrewed, pull the crown out
to positions 2 or 3 to make the settings. Then push
the crown back home and screw it down again.