iwc IW3566 Operating Instructions Manual page 21

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Watches with a soft-iron inner case
provide a higher level of protection
against magnetic fields and far exceed
the requirements of DIN standard
8309. Nevertheless, it is still possible
for the watch movement to be mag-
netized in the close proximity of very
strong magnets. We therefore recom-
mend that watches with a soft-iron
inner case also be kept away from
direct contact with strong magnets.
Should there be a sudden change in
the precision of your timepiece, please
contact an authorized IWC Official
Agent to have your watch checked
for magnetism.
D A V I N C I A U T O M A T I C
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