1948
1953
1954
racrolelt
@1947
Look on the butt of the revolver.
Minty K22's can bring $500, or more in rare variations. I don't think that is the serial number however. The serial number will be found on the butt of the gun, not inside the crane.
1948. Worth spending the $30 to get it lettered by Smith and Wesson, IMHO.
Call S&W with the serial number or look it up in the Standard Catalog of Smith and Wesson, 3rd ed by Supica and Nahas.
If you call S&W, they will tell you.
K130218 was produced in 1951
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.