IWC Schaffhausen PORTUGIESER TOURBILLON RÉTROGRADE CHRONOGRAPH Mode D'emploi page 22

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D A T E S E T T I N G
The date indicator is retrograde, meaning that at the end of the
31st day, the hand jumps back to the first day. If a month has fewer
than 31 days, you will need to set the date manually to the first day
of the following month. Pull out the crown to position 1. You can
now set the date by turning the crown to the right (direct advance).
You should not use the rapid-adjustment function between 8 p.m.
and 2 a.m. because the movement automat ically advances the
date during this period.
T I M E S E T T I N G
Pull out the crown to position 2. With the crown in this position, you
can set the time by turning the crown. You must push in the crown
to position 0 before wearing the watch. 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 forward by 12 hours.
P O R T U G I E S E R T O U R B I L L O N R É T R O G R A D E C H R O N O G R A P H