This is a group of six various antique railroad lamp glass lenses with the large blue one marked Optical Corning and dated 1905.The smaller amber/red lenses are marked Kopp Glass 4 1/2 and some have edge chips.

This is a group of six various antique railroad lamp glass lenses with the large blue one marked Optical Corning and dated 1905.The smaller amber/red lenses are marked Kopp Glass 4 1/2 and some have edge chips.