I found an old Wesson (not Smith & Wesson) handgun when cleaning out my grandfathers house. It must be old as its got Pat. 1870 stamped on it. It looks like its about a .22 cal with a hex shaped 10" or so barrel. It looks quite unique because there is no trigger guard on it and its a single fire, but not a break barrel type, it rotates open to load. The other unique feature is that it has a rifle like steel framed stock that can be attached to the butt of the gun. Is this gun worth anything? I'm not a collector just an small game hunter?