IWC Schaffhausen Portugieser Chronograph Rattrapante Mode D'emploi page 26

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, clean-
ing agents or cosmetic products. This way you can prevent discol-
oration and premature ageing of the material.
H O W OF T E N SH O U L D MY WA T C H BE SE R V I C E D ?
The optimal service cycle for your IWC timepiece is exclusive to your
watch and unique lifestyle. The necessary interval between services
will be determined by your individual wearing habits; frequency of
wear, your environment/s, and the intensity of physical activity you
engage in. Your fine mechanical timepiece is an extension of yourself
and will run well for as long and smoothly as it is treated. Therefore,
we simply recommend you to continue wearing your watch for as
long as pleases you and to only entrust it for a service if you notice a
deviation from the regular performance, function or timekeeping. It will
then be our pleasure to reinstate the premium performance with the
suitable service.
P O R T U G I E S E R C H R O N O G R A P H R A T T R A P A N T E
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