IWC Schaffhausen PORTUGIESER PERPETUAL CALENDAR EDITION ARIJE Instrucciones De Manejo página 23

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Power reserve display
The power reserve display is divided into 7 days with continuous display. The
winding mechanism winds the watch continuously while you are wearing it,
and you can follow the process on the power reserve indicator. The marking in
the area of the last day tells you that the power reserve is about to expire. You
should then wind the watch by hand, if necessary, since the precision can be
reduced in this area.
Moon phase display
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Full moon Waning moon New moon Waxing moon
The moon phase display is automatically set by the calendar so that it is
always correct. The transmission ratio is so precise that the display deviates
by only a single day after 577 years.