Without a serial number, there is no way to answer.
1973
@ 1978
Impossible to answer with just the serial number.
1980
Impossible to answer. Is it a rifle, handgun or shotgun?
1971 sales@countrygunsmith.net
Early 80's.
Call S&W and they will tell you when it left the factory.
smith and Wesson (smith & Wesson) and Sig-Sauer
You must call S&W to find out.
The serial number tells when this gun was made in this product line.(1956, 2002,etc.)
Impossible to say without a more detailed description of the handgun in question.