About 1957-58
1956 570,813 shipped 7/21/1956
1956
With the serial number that you have provided,your Hi standard M-101,.22cal pistol was made in the year 1955.
1954-58
1968 2,030,404 Above was first serial number for 1968. Following year began with 2,172,356.
Between 1971-1973.
Impossible to answer without a serial number.
Frame
With the serial number that you have provided,your Hi standard Model B was made by Hi Standard in the year 1936.
International Standard Serial Number
our Hi-Standard Sport King dates to the year 1974 with the serial number provided.