iwc PORTUGIESER PERPETUAL CALENDAR TOURBILLON Operating Instructions Manual page 14

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as the small seconds hand passes 60.
Push back the crown to position 1. In
this position, you can safely set the date
to the previous day. If you now pull the
crown out to position 2, you can set
the exact time in hours and minutes.
When doing this, move the minute
hand a few minute strokes beyond the
time to be set. Then position the minute
hand by moving it gently backwards
until it is exactly above the correct
minute stroke. This ensures that the
minute hand begins to move immedi­
ately when you restart the movement.
If the date does not jump to today's
date when it passes 12 o'clock, you
must wind the hour hand forward by
a further 12 hours. Once the hour and
minute have been set to the correct
P O R T U G I E S E R P E R P E T U A L C A L E N D A R T O U R B I L L O N