The pistol in the middle, is interesting, it was built by Jim Clark Sr, in 1962-63 (it’s marked under the slide) on a standard Government model, I’m assuming that the rails may have been welded up an recut as there is zero play in the frame/slide fit. When I got it, it had hammer follow thru, and was IMO dangerous to shoot..I called Wilson Combat and they did a trigger job on it replacing all the worn parts, it turned out great. Classic example of a 60’s era target 1911.