iwc Portugieser grande Complication Mode D'emploi page 27

Examples:
04.18 4 hour chimes, 1 quarter chime, 3 minute chimes
10.45 10 hour chimes, 3 quarter chimes, 0 minute chimes
12.14 12 hour chimes, 0 quarter chimes, 14 minute chimes
Crossing time zones and the International Date Line with the
Portuguese Grande Complication
Setting when crossing time zones:
• When crossing time zones in an easterly direction, you should simply set
the time forwards to the new local time.
• When crossing time zones in a westerly direction, you can set the hands
of your watch back to the actual time of day. When doing this, however,
you must not move back into the calendar's automatic switching phase,
i.e. beyond 2 a.m. If this situation occurs when you are travelling west,
you should set the local time of your destination before 8 p.m. You must
not turn the hands back between 8 p.m. and 2 a.m.
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