It is Spanish, the trademark is Crucelegui Hermanos. Value is about as close to nil as you can get, and putting any time or money into it won't change that.
A lot of those guns were sold in Latin America, often passed off as Smith & Wessons. If you are close to the Mexican border, it may have come in from that direction.
I guess turning it in would be the right thing to do as it might have been used in a crime, but probably not a recent one, as those guns have not been made for nearly a century. Another possibility is to see if there are gun buyback programs in your area offering $100 "to get a gun off the street"; if so, take the money and run.
Jim