IWC Schaffhausen ingenieur constant-force tourbillon Mode D'emploi page 21

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W I n d I n g p o s I t I o n
With the crown in the winding position (0), you can wind the 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 to the point at which you feel a distinct resist­
ance as this will ensure maximum accuracy. The crown must always be in position X
when you are wearing your watch.
M o o n p h a s e s e t t I n g
Although the watch is limited to a 12­hour display, the movement makes a distinc­
tion between 12 noon and 12 midnight. The moon phase moves on 1 day at midnight
every day (like a date switch). If your watch has stopped, the moon phase needs to
be adapted to the current moon position. To do this, move the crown into position 1
and adjust the moon phase by rotating the crown to the left or right. You should not
use the rapid­advance function between 8 p.m. and 2 a.m. because the movement
automatically advances the moon phase during this period.
Procedure: consult the daily press or another source to find the current moon phase
(e.g. the Internet, lunar calendar) and set the countdown display to the number of
days to the next full moon.
I n g e n I e u r C o n s t a n t - F o r C e t o u r b I l l o n