It is a K frame. You would call your gun a model 48-4. Post the first numbers of your serial # (on the butt of the gun) and someone will give you a guess on the production date.
Ed
It's a .22 Magnum rimfire, it came in 4, 6 and 8 3/8" barrels, and the later ones did not have the barrel pin. There may be just a little information here on the site...
K48
Post the first numbers of your serial # (on the butt of the gun) and someone will give you a guess on the production date.
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