iwc PORTUGIESER PERPETUAL CALENDAR 42 Operating Instructions Manual page 11

— 1 2 —
and minutes. 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 time using this process, push back the crown
to position 0 to start the seconds hand.
Warning:
In order to protect the watch from the ingress of water, the
crown must always be in position 0 and should only be pulled
out to position 1 or 2 when setting the watch.
PORTUGIESER PERPETUAL CALENDAR 42