My dad got drafted to go to Vietnam in 1969 and he was in Nam all of 1970 until he got his purple heart. He was in the Army's 11th Armored Calvary a.k.a. Blackhorse Regiment and they were recently awarded the Presidential Unit Citation. He drove a tank and he always talks about how nice his .45 was and how much he wished he had one right now. We went to a gun show today and a guy had a Colt 1911 and he wanted $1600 for it and my dad said it was kinda like that one but he didn't want to spend that much. How can I find the EXACT .45 he had when his was in the service?