if you contact smith & Wesson directly...you might get lucky and get answer. I can tell you it was made sometime between 1953 and 1968
K 7981 smith&wesson
1880
Your Smith and Wesson model 640,.38 centennial stainless was made from 1989-1996.The prefix of BKF to your serial number indicates that it was made in the year 1991 or 1992.
Your smith and Wesson model 640,.38 centennial stainless was made from 1989-1996.The prefix of BKF to your serial number indicates that it was made in the year 1991 or 1992.
1980
1947
You will need to add the model of Smith and Wesson to your serial number to get the correct year of manufacture.
No serial number provided.
No serial number provided.
No serial number provided.
No serial number = no way to answer.
Need the serial number