When was The Marshall .22 cal 9 shot revolver made by High Standard MFG Corp?

Marshall

A nine shot single action or double action revolver for .22 short, long, or long rifle cartridges. Aluminum frame. Offered in a special promotion package with a holster, trigger lock and spray can of G-96 gun scrubber. Listed in catalogs and price lists 1971-1973. To date shipments confirmed only in 1971.