iwc IW3921 Operating Instructions Manual page 32

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SERVICING YOUR DA VINCI
PERPETUAL CALENDAR
CHRONOGRAPH
Although the parts in this watch are
all manufactured from top­quality
ma ter ials, a number of components
are subject to natural wear and tear.
It is particularly important to ensure
that the points at which wear occurs
are always well lubricated and that
oil contaminated by metal abrasion
is regu larly removed. For this reason,
we recommend that you have your
watch serviced approximately every
5 years. Please contact an authorized
IWC Official Agent or send your watch
directly to the IWC Customer Service
Department in Schaffhausen.
D A V I N C I P E R P E T U A L C A L E N D A R C H R O N O G R A P H