This gun was made from '54-'59 (Standard Catalog of S & W); I don't know exactly when the serial no. 1982 was made.
The Smith and Wesson model 19-5 was made from 1982-1985.
The Smith and Wesson model K14-3 was produced from 1947-1982. You would need to write into Smith and Wesson with the model and serial number. They can pull the date and send it back to you.
1982
1982
1982
1982
1982
1977-1982
82
1982
1982
That sn is c.1982 and is probably a Model 581.