iwc INGENIEUR PERPETUAL CALENDAR DIGITAL DATE-MONTH Bedienungsanleitung Seite 37

unusually harsh conditions. If the tests are not carried out as
stipulated, or if the watch is opened by unauthorized persons,
IWC will accept no warranty or liability claims.
Recommendation: Your authorized IWC Official Agent must
carry out a water­resistance test whenever your IWC watch is
opened and serviced.
If your watch has a strap made of leather, textile or rubber with
a leather or textile inlay, make sure that the high­quality strap
does not come into contact with water, oily substances, solvents,
cleaning agents or cosmetic products. This way you can prevent
discoloration and premature ageing of the material.
I N G E N I E U R P E R P E T U A L C A L E N D A R D I G I TA L D AT E - M O N T H
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