Additionally, 1949 thru 1959 Model numbers consisted of two characters, a Number and a Letter.
1/2, 3/4, and 1 ton trucks started with a '3'.
A '3B' would be a Series 3200 truck.. which is a 1/2 ton truck with a 123.2 inch wheelbase.. slightly longer than the standard '3A' 3100 1/2 ton trucks 114 inch wheelbase.
