Victorinox SWISS AIR FORCE Manual page 12

CHRONOGRAPH FUNCTIONS
Start-Stop Function
A. Press Push-piece A once to start the timing operation; press again
to stop.
Restart Timing
A. Press Push-piece A again to restart timing.
Zero Reset
A. Once the timing operation has stopped, press Push-piece B.
The chronograph and totalizer hands will reset to zero.
Measurement of Partial Times (Addition Function)
A. Press Push-piece A again to restart timing. Further pressure on
Push-piece A will stop the timing operation. The chronograph will
indicate the final time.
B. Once the timing operation has been stopped, press Push-piece B.
The chronograph and totalizer hands will be reset to zero.
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