Victorinox SWISS AIR FORCE Manual page 24

D. Press Push-piece A to stop measurement of the second time.
E. The chronograph will indicate the first time.
F. Press Push-piece B to display the second time.
G. Press Push-piece B again. The chronograph and totalizer hands
will reset to zero.
WARNING: Do not activate the Push-pieces under water.
REINITIALIZING THE CHRONOGRAPH HANDS
Following an incorrect activate, violent impact or exposure to a strong
magnetic field, one or the other of the chronograph counter hands
may fail to revert to its original position (zero). To reinitialize the hands,
proceed as follows:
Zero Reset of the Hour Counter Hand
A. Pull out the crown to position (2).
B. Press Push-piece A briefly until the hand reverts to the original
position (on 12).
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