As it was originally cataloged, it was available in the same 25-35 W.C.F., 30 W.C.F., and 32 W.S. cartridges as the Model 55. Like the Model 55, the Model 64 was never officially offered or cataloged in either the 32-40 or 38-55 cartridges, but there were a very small number of each that were made up through the year 1937.