I have a 32 L rp handejector 4" bbl square butt, square latch, ugly imitation ivory grips. [Franzite?] It has a number in the yoke that matches a number in the frame where the yoke rests. [83xxx] It has numbers on the cylinder and the butt that match. [63xxx] Which would be the serial #? Parts gun or late model assembly? The nickel finish seems uniform and seems to match.