Swiss Military Manual page 16

16
For example, 1 oz = 28.35 grams, rotate the inner scale until the (10/arrow)
number is below the 28.35 on the outer scale. Now all the numbers on the
outer scale become grams and all the numbers on the inner scale become
ounces. As an example, look at 85 on the outer scale. It is pointing to 30 on
the inner scale. Making a decimal point adjustment to 3.0 you now know that
3 oz. are almost 85 grams.
Currency Conversion
Suppose the currency rate for the Swiss Franc is SFR 1.30 to $1.00 USD.
Rotate the inner scale to set (10/arrow) number opposite the 13 on the outer
scale. The outer scale becomes Swiss Francs and the inner scale reflects the
USD equivalent (e.g., to convert SFR 4.00 to USD, look at the number on the
inner scale opposite the 40 on the outer scale and you will see the number 31.
Therefore, SFR 4.00 = $3.10 USD).