IWC Schaffhausen PORTUGIESER PERPETUAL CALENDAR 42 Mode D'emploi page 28

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To ensure that your watch stays properly water-resistant, you should have it checked by an IWC service
centre at least once a year. Your watch should also be tested after exposure to unusually harsh condi-
tions. 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 water-resistance test when-
ever your IWC watch is opened and serviced.
NOTE
If your watch has a strap made of leather, textile or rubber with a leather or textile inlay, make sure that
the high-quality 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.
PORTUGIESER PERPETUAL CALENDAR 42