My notes indicate the capacities of the various models are as follows ("usable" is a little less than these numbers):
1965 337 through 1972 337F
Standard: 92.8
Long Range: 131
1973 - 1974 337G
Standard: 92.8
Long Range: 125
1975 337G
Standard: 92.8
Long Range: 150
1976 337G through 1980 337H
Standard: 90.6
Long Range: 150.6
|