Contact the maker. If they are not in business, look for books written on them.
You can try a value guide such as the Blue Book of Gun Values, which may tell you the year it was manufactured, and you can contact the manufacturer, who may be able to tell you. It's unlikely, however, that you will be able to find out the original retailer.
You will probably have to contact the manufacturer to get the exact year, but depending on the gun, you may can check in the Blue Book of Gun Values. That has some serial numbers listed. It's unlikely you will be able to find out the original retailer.
It could be High Standard if its a handgun
1973
@ 1978
1980
about 1926.................
@ 1902
1971 sales@countrygunsmith.net
Early 80's.
about 1947
You must call S&W to find out.