This number falls onto a 1964 "HIGH STANDERD" pistol.
About 1957-58
Impossible to answer without a serial number.
To determine the age of a Hi-Standard M-101 Duramatic pistol, you can check the serial number, which is typically located on the frame. The manufacturer's records and known production ranges can help pinpoint the year of manufacture based on the serial number. Additionally, inspecting specific features or markings that were only present during certain production periods can provide further clues to its age. Consulting with a firearms expert or collector can also aid in accurately dating the firearm.
1956
1956 570,813 shipped 7/21/1956
1954-58
Between 1971-1973.
1968 2,030,404 Above was first serial number for 1968. Following year began with 2,172,356.
With the serial number that you have provided,your Hi standard M-101,.22cal pistol was made in the year 1955.
The VIN number will identify the year of manufacture.
If you would post the serial number and model number,I can give you a date of manufacture.
The 10th digit is the year of manufacture.