The manufacture date of a specific SW model can vary depending on the model and production year. Typically, you can find the manufacture date on the product label, in the user manual, or within the device's settings if it's an electronic product. If you provide a specific SW model, I may be able to assist you further.
1976
1975
You will have to call S&W
@1981
@27 years ago.
Shipped from the factory @ 1982
1961-1962
1977
Impossible to do with just the sn.
Call S&W and they will tell you when it shipped from the factory.
1968
Very late 90's to early 2000's.