iwc IW3566 Operating Instructions Manual page 23

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To ensure that your watch con tinues
to function perfectly, you should have
it checked by an IWC service centre
at least once a year. Your watch
should also be tested after exposure
to unusual ly harsh conditions. If the
tests are not carried out as stipulated,
or if the watch is opened by unauthor-
ized persons, IWC will accept no war-
ranty or liability claims.
Recommendation: Your authorized
IWC Official Agent must carry out a
water-resistance test whenever your
IWC watch is opened and serviced.
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