You need to call S&W with the serial number to find out.
@ 66 or so
Early 80's. Call S&W and they will tell you when it left the factory.
serial number 514X9
The Smith and Wesson model 66-1 was made from 1977-1981.
the smith and Wesson model 66-2 was made from 1982 until 1986 when the model 66-3 occurred.
1980
1981
Check the butt under the grips.
No such serial number in the Model 60 range.
You will have to call S&W with the serial number to find out.
Mid 80's or later. Call S&W and they will tell you for sure.
@1979