Victorinox CHRONOGRAPHS Watch Basic Operating Instructions Manual page 21

second counter hand (both located on center post - silver with red tip)
and one tenth second indicator.
Measurement of Elapsed Times
A. Press Pusher A (at 2 o'clock) to start the timing operation.
B. Press again to stop timing. NOTE: Timing will be indicated within
1/10th of a second on appropriate sub-dial.
These two operations may be repeated several times, to add short time
measurements.
C. Once the timing operation has been completed, press Pusher B
(at 4 o'clock) briefly until the hands revert to the original position.
Measurement of Intermediate (Split) Times
A. Press Pusher A to start timing.
B. Press Pusher B to read off the first split time without interrupting the
measurement of total time.
C. Press Pusher B to continue timing. The chronograph will continue its
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