I was recently given a K22 by a relative and gun enthusiast. I have done a little bit of research, but I would like to know more about it. The serial # is K1624XX, it is blued, it has a 4" barrel, and the grips are not original. The grips are genuine stag, but I would like to get period correct grips as well. It has adjustable sights and an assembly screw at the top of the side plate, which dates it to 1955 or earlier. I mainly want to know because I like to know the history of my firearms and for insurance purposes. My other firearms were much easier to research. Any help would be greatly appreciated.