iwc Fliegeruhr Worldtime Mode D'emploi page 26

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If a month has fewer than 31 days, you will need to set the date
manually to the first day of the following month. By turning the
crown to the left, you can now move the hour hand forwards
24 hours in one-hour steps. As the hour hand passes midnight,
the date is advanced to the next day. You have now corrected
the time display by one day while the movement continues to run.
t i m e s e t t i n g
Pull out the crown to position 2. This will stop the movement.
To set the time accurately to the second, it is best to stop the
movement as the seconds hand passes 60. The minute hand and
the 24-hour world time display can now be set (the hour hand
is set separately with the crown in position 1). Now 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 immediately when you restart the
movement. To start the movement, push in the crown to pos-
ition 0.
p i l o t ' s W a t c h W o r l d t i m e r