Help please-anyone know these Colt models?

[jlb43]

I did notice that the center gun is somewhat different where the barrel meets the frame.

The barrel lug is rabbeted to form sort of an interlock between barrel and frame. I have not seen that before. Usually they are two flat surfaces with pins to orient them and prevent movement once the wedge is in place.

 

[deerslayer303]

The bottom one looks like the barrel is pointing up at an angle. May just be the pics. The top one also looks this way to me but not as severe. I do know one thing. I WOULD NOT even attempt to fire them things, you just may not get your hand back.