Black Army 1911?

[GUTS]

I fellow from around here wants to sell this 1911 for $2500. I am not as smart on 1911's as some of you are so I need your advice on whether I should buy it or not. I took it apart and tried to take some decent photos but it's tough to get the right light sometimes. The untouched finish inside the frame is black. The finish that is left looks black to the eye and seems to have the "flaking" that usually happens as the finish wears down. The rear sight and the recoil spring guide are from an A1 but the rest of the parts seem correct. I believe the non-heart cut reciever is correct for this serial range. The slide, frame and the barrel have the complete serial number on them. The thing I find strange is the lack of a U.S. PROPERTY stamp on the left side of the frame and also no eagle head inspector stamp and they have not been removed so was it never issued? The 2-tone magazine is a nice bonus.