iwc PORTUGIESER PERPETUAL CALENDAR Mode D'emploi page 21

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Please note:
You must not move the calendar beyond the correct date. The complicated
movement is mechanically programmed and cannot be moved back in time
without making a professional adjustment to the movement. However, if you
do move the date forwards beyond the correct date, you have two options:
you can either pull out the crown to position 2 to stop the movement until the
calendar setting matches the correct date once again. This makes sense if the
date has been set only a few days ahead. Or, you must take your watch to your
watchmaker, who will be able to adjust the movement to reset the calendar.
This is recommended in the event of larger maladjustments.
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. Now move the minute hand a few minute strokes beyond
the time to be set. Then position the minute hand by moving it gently back-
wards until it is exactly above the correct minute stroke. This ensures that the
minute hand begins to move immediately when you restart the movement. To
start the seconds hand, push in the crown to position 0. Moving the hands
forwards past midnight causes the calendar to switch to the following day.
When advancing the calendar, you can follow and observe the automatic
switching sequence.
Important:
• Under no circumstances must the hands be turned back between 8 p.m.
and 2 a.m. as this will result in maladjustment of the calendar.
• The hands must never be turned anticlockwise beyond 2 a.m.
• The crown must be pushed back into the normal position before wearing
the watch to avoid unintentional adjustment of the calendar.
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