IWC Schaffhausen BIG PILOT'S Le Petit Prince Mode D'emploi page 27

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Important: The watch is water­resistant in positions 0, 1 and 2 as
long as the crown is not moved.
The crown should generally always be screwed in for normal
use to ensure the stability of the seal and to protect the winding
mechanism.
W I N D I N G P O S I T I O N
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 movement. However, it is better to wind the
watch by turning the crown through approximately 20 revolutions
as this will ensure maximum accuracy.
Q U I C K S E T T I N G T H E C A L E N D A R
Loosen the screw­in crown and pull it to position 1. In this position,
you can use the direct­advance function to move the date and the
month forwards one step at a time by turning the crown slowly
but continuously to the left. To move the day forward one step
at a time, turn the crown slowly but continuously to the right.
The calendar must not be adjusted between 6 p.m. and 3 a.m.
B I G P I L O T ' S WAT C H A N N U A L C A L E N D A R