iwc IW3921, Operating Instructions Manual

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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
Aggregate timing:
You can add stop
times together by pressing the start/
stop push­button again after the first
measurement instead of the reset/fly­
back push­button.
SETTING THE CALENDAR
Pull out the crown to position 1. In
this position, you can use the direct­
advance function to move the calendar
forward one step at a time by turning
the crown slowly to the right. The cal­
endar must not be adjusted between
8 p.m. and 2 a.m.
Please note:
– Turning the crown too quickly when