iwc INGENIEUR AUTOMATIC 3570 Mode D'emploi page 31

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I N F O R M AT I O N A B O U T M A G N E T I C F I E L D S
As a result of the ever greater prevalence in recent years of very
strong magnets made from rare-earth alloys (e.g. neodymium-
iron-boron) – these are found in objects such as loudspeakers,
mobile phones and fasteners on jewellery as well as handbags –
mechanical watches are increasingly likely to come into contact
with such magnets and become magnetized. This can lead to
the watch rate being permanently affected, a problem that can
only be resolved by a process of demagnetization carried out by
a specialist. We recommend that you keep your watch away from
such magnets.
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 become magnetized in close proximity to
very strong magnets. We therefore recommend 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.
I N G E N I E U R A U T O M AT I C