IWC Schaffhausen 3905 Mode D'emploi page 27

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u s i n g t h e c h r O n O g r a p h
Start: To start the chronograph, press the start/stop push-button.
Flyback: You can start recording a new time immediately, even
when the chronograph is running. Simply depress the reset/flyback
push-button fully as far as it will go. All three chronograph hands
are reset to zero, and a new measurement is started as soon as
the push-button is released.
Stop: To stop the running chronograph, press the start/stop
push-button.
Reset: Depress the reset/flyback push-button fully as far as it
will go. This will reset all the chronograph hands to zero.
Aggregate time recording: You can add stop times together by
pressing the start/stop push-button again after the first measure-
ment instead of the reset/flyback push-button.
P o r t u g i e s e r Y a c h t c l u b c h r o n o g r a P h