IWC Schaffhausen AQUATIMER AUTOMATIC 2000 Mode D'emploi page 26

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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. 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
seconds hand, push in the crown to position 0. When setting the
time, please be aware of the date change, which always takes
place at 12 midnight. If this change has already taken place at 12
noon, you must move the hands forwards by 12 hours.
Important: Although the watch is water-resistant in positions 0,
1 and 2, the crown should always be screwed in again for normal
use (position X).
A Q U A T I M E R A U T O M A T I C 2 0 0 0