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With the serial number that you have provided,your Hi standard M-101,.22cal pistol was made in the year 1955.
Contact High Standard with the Serial Number and they will tell you when it was manufactured.
1971
1,000,000,000
1934. A rather early pistol.
With the serial number that you have provided,your Hi-Standard model E pistol was made by that firm in the year 1939.
Need the serial number
Impossible to answer without a serial number.
Go to the Ruger website, customer service, historical data, pistol, find your model, and there is a serial number/ year of production list.With the serial number that you provided,your Ruger standard model single six revolver was made in 1960.If you have a standard model automatic Mark I pistol,it was made in 1957.
Pre 1950
Early 1934
See link below to High Standard data. You did not give us model number.