I have an old Smith that belonged to my Grandmother that I've been trying to date, and possibly get a value on. On the inside cylinder it's stamped mod. 36, then G10, and a SN 15XXX. Underneath the grips it's stamped with the same serial and G10, plus and oversized N. On the butt of the gun it stamped with a different set of numbers, with a letter included xxxJxx. And there is stamps on the grips themselves. It also has a 3 screw side plate. Any info would be appreciated, also if anyone knows somewhere local to the city, or state that can refinish the nickel plating, that would be helpful as well