IWC Schaffhausen Pilot's Watch Double Chronograph Edition TOP GUN Mode D'emploi page 18

Functions of the crown
25 5
X
Normal position
This watch has a screw-in crown. Screwing the crown in to its normal pos-
ition (X) prevents the inadvertent adjustment of the time or date and also
acts as a double seal to prevent water from seeping into the case. To release
the crown, unscrew it by turning it to the left, where it automatically assumes
position 0, the winding position. By depressing the crown in position X
and turning it to the right at the same time, it is screwed down firmly again and
secured.
Winding position
With the crown in the winding position (0), you can also wind the automatic
movement by hand. A few revolutions of the crown are enough to start the mo-
vement. However, it is better to wind the watch by turning the crown through
approximately 20 revolutions, as this will ensure maximum accuracy.
X Normal position (screwed in)
0 Winding position
1 Date and day setting
2 Time setting
0 1 2