IWC Schaffhausen 3950 Mode D'emploi page 34

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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/fly-
back 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 I L O T ' S W A T C H T I M E Z O N E R C H R O N O G R A P H