There is roughness around inside edge.
Vintage Major Kopp Glass Convex Lens Red 7 9/16 (?) No 758 Made in USA
Vintage KOPP GLASS Railroad Highway Reflector XR7510 - 5-1/4" Blue Hobnail Glass
Vintage KOPP GLASS Railroad Highway Reflector XR7510 - 5-1/4" Red Hobnail Glass
VINTAGE KOPP GLASS RAILROAD LENS 4.75" With Birds And Flower Glass HairlineCrack
Vintage Kopp Glass ~ Amber Glass Lens 4 1/2" L 3 F ~ Lamp Lantern Signal ~ NOS
