So we have this gun hanging on the wall, and according to my mom it was her great grandfather fathers of some thing like that. He fought with it in the civil war and after it was over he carried it home. I've looked at it, its in good shape, but looks like it used percussion caps? I guess they had those then?? If I wanted to know more about it how would I go about doing that? Not think I would EVER sell it, I am curious what it could be worth.