No serial number provided.
1963
Impossible to answer without a serial number.
Your Smith and Wesson K-22 was made in the year 1948,with the serial number K20708.That year the serial numbers were K18732-K73121.I hope that you find this informative.
1980.
1954
1958
1952
K276694 was produced in 1956.
The K prefix to your serial number puts the year of manufacture in 1953.
With the serial number that you have provided,your Smith and Wesson K-38 was made in the year 1956.
Call S&W with the serial number and they will tell you when it left the factory.
1951