Brian, in going by your brief description, it would be impossible for anyone to give you an idea of what it is worth.
Post some close-up pictures so that we can help you better.
What I can tell you about your gun sight unseen, hopefully, is that it is what I call a 2 pin 1 screw lock. It will have the Type III hammers or "C" style and the top tang will be tapered instead of stepped. Plus it was made in 1910.