You need to provide the number from the butt of the revolver. That is the sn.
1974
74
Call S&W and they will tell you.
Check on the butt.
1980
No serial number provided.
No serial number provided.
Need the serial number
No serial number = no way to answer.
No serial number provided.
K 7981 smith&wesson
You will need to add the model of Smith and Wesson to your serial number to get the correct year of manufacture.