Patek Philippe 240 Q Manual De Instrucciones página 15

Caution:
Please set the time before you put the watch on. 15
This prevents lateral pressure on the winding stem. Please
use your fingernails to pull the crown out and turn it gently
between two fingertips.
Never pull out the crown in a humid environment or under-
water: the water resistance of your watch is assured only
when the crown is pushed home.