Citizen E610 Instruction Manual page 89

[How to convert volume between different units of measurement]
You can convert fuel between Pounds (lbs), U.S Gallons, Imperial Gallons or Liters.
Q : How much is 13.1 lbs of fuel if it is converted into U.S.Gallons, Imperial Gallons
and Litres respectively ?
(1 FUEL.LBS is 0.167 U.S.GAL
/ 0.139 IMP.GAL / 0.632
Liters)
A : Adjust the "  " of FUEL.LBS.
of the outer scale until it points
to the digit 13.1, which you
want to convert, of the inner scale.
Read the digit corresponding to the "  " of U.S.GAL of the outer scale.
Adding a unit and you will get the answer which is 2.18 U.S.GAL.
Similarly, read the digit corresponding to the "  " of IMP.GAL., LITERS., you
can get the answers, which are 1.82 IMP.GAL and 8.28 Liters.
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