CSA stamp, i think that was an older repro company...confederate small arms? Find a gun shop that is good with old firearms, take it in, but if one is a repro, i'd very likely suspect both in that display are, and that makes them both restricted.
oh, and the grip frame on the 31 looks like a patterson grip, i believe it's incorrect on that model, (again making me think repro) but i'm NOT an expert. I'm sure someone will be along tonight with better information