iwc PORTUGIESER YACHT CLUB CHRONOGRAPH Mode D'emploi page 23

Servicing your Portuguese Yacht Club Chronograph
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Although the parts in this watch are all manufactured from top-quality mater-
ials, a number of components are subject to natural wear and tear. It is par-
ticularly important to ensure that the points at which wear occurs are always
well lubricated and that oil contaminated by metal abrasion is regularly re-
moved. For this reason, we recommend that you have your watch serviced
approximately every five years. Please contact an authorised IWC Official
Agent or send your watch directly to the IWC Customer Service Department
in Schaffhausen.
Effective from October 2010.
Technical specifications subject to change.