Charlies, that is a very early K-22 and very desirable I might add. That one is probably a 1947 production and will have what we call a large ejector knob and one line address (made in USA on the side). The grips should be magna's which are the ones that kinda go up high (and cover the screw on the sideplate). They should be "high horn" which is what we call them when they have a rather sharpened outline on the top of the grips. You will need to check all the areas on that gun to see if they match in number... check the grips, the butt, the barrell flat and even the back of the ejector star. That sounds like a really neat gun. I also have one in the 29XX serial number range.
That one's keeper.
Roger