Swiss Military Manual page 13

USING THE 12-HOUR CHRONOGRAPH WITH SLIDE
13
RULE FUNCTION (SR)
This SR can perform a variety of calculations from currency conversions to
multiplication and division problems with 94% accuracy. With the circular
slide, you can calculate any conversion of a linear nature with a constant ratio
such as ounces to grams, kilograms to pounds, miles to kilometers, etc.
Important note: The 10:00 crown features a screw-down mechanism to
protect against accidental adjustments. Rotate the crown counterclockwise
to move the crown away from the watch. Always screw down the crown af-
ter making adjustments. This is vital for protecting your watch against water
intrusion.
1. Rotate the 10:00 crown counterclockwise until it moves away from the
watch. This will set the crown in Position 2.