iwc Aquatimer Deep Two 3547 Mode D'emploi page 27

Winding position 24 | 25
With the crown in the winding position (0), you can also wind the automatic
movement by hand. A few revolutions of the crown are enough to start the
movement. However, it is better to wind the watch by turning the crown
through approximately 20 revolutions as this will ensure maximum accuracy.
Date setting
If a month has fewer than 31 days, you will need to set the date manually to
the first day of the following month. Release the screw-in crown and pull
it out to position 1. You can now set the date by turning the crown to the left
(rapid advance). You should not use the rapid-advance function between
8 p.m. and 2 a.m. because the movement automatically advances the date
during this period.
Time setting
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 back-
wards 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).