My most treasured pieces.

I am posting my favorite treasure and I would like to more about them. My Uncle had these hanging in his house and I always admired them when I was a kid. I liked them so much that I started going to antique shows and stores to see if I could find them. I did find they gray one in a warehouse shop in Milwaukee but I never saw them in any shop or show again. My Uncle gave me his about 10 years ago because he new how much I loved them. They are 18 inches tall and about 6 inches wide. The gray and blue one have the marking RICHTER 1964 on the left side of his head. It is really hard to photogragh it. I believe they are suppose to be Civil War soldiers. The one in the middle has no markings. I would like to know some information about these and if there were anymore made. I tried to find information on these with no luck. I would love your help. Thanks.