My first post here and I am new to the 1911 world and had the chance to pickup a well used Colt 1911 and I know very little about them. I found a nasty looking Commander at a pawn shop and did a SN# lookup. It looks to be a 1955 model. SN# 354xx-LW. It has a three hole trigger which I think is not original. Lots of color gone on the alloy frame and some surface rust on the outside of the barrel. It seems to function OK, I want a shooter and not a safe queen. After 60 years who knows what has been changed or worn out. It is a little late to ask, but what should I have looked for when buying this used Colt? The price was $450 out the door.