iwc Portugieser grande Complication Mode D'emploi page 29

Water-resistance 26 | 27
The water-resistance of IWC watches is stated in bar and not in metres.
Metres, which are often used elsewhere in the watch industry to indicate
water-resistance, cannot be equated with dive depth because of the test
procedures that are frequently used. Water-resistance shown in metres pro-
vides no indication as to actual use of the watch in the presence of moisture
and wetness, and in or under water. Recommendations for use in connection
with the water-resistance of your watch can be found on the Internet at
www.iwc.com/water-resistance. Your authorized IWC Official Agent will also
be pleased to provide you with information.
To ensure that your watch continues to function perfectly, 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 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
water-resistance test whenever your IWC watch is opened and serviced.
How often should my watch be serviced?
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.
Effective from February 2010.
Technical specifications subject to change.