iwc PORTUGIESER PERPETUAL CALENDAR Mode D'emploi page 20

Functions of the crown
0
Normal position
With the crown in the normal position (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 movement fully by
turning the crown through about 30 revolutions. This will ensure maximum
accuracy and a power reserve of approximately 7 days (168 hours), even if
you are not wear-ing your watch.
Power reserve display
The power reserve display is divided into 7 days with continuous display. The
winding mechanism winds the watch continuously while you are wearing it,
and you can follow the process on the power reserve display. The marking in
the area of the last day tells you that the power reserve is about to expire. You
should then wind the watch by hand, if necessary, since the precision can be
reduced in this area.
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2
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Normal position
Setting the calendar
Time setting