iwc PORTUGIESER AUTOMATIC Operating Instructions Manual page 17

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Time setting
Pull out the crown to position 2. This will stop the movement. To set the time
accurately to the second, it is best to stop the movement as the seconds
hand passes 60. You can now set the time by turning the crown and position-
ing the minute hand exactly above the minute stroke. To start the seconds
hand, push in the crown to position 0. When setting the time, please be
aware of the date change, which always takes place at 12 midnight. If this
change has already taken place at 12 noon, you must move the hands for-
wards by 12 hours.
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.