Kopp logo (K with circle around it) is embossed onto glass. Small nick near bottom on inner side that will not be noticeable when placed in lantern.
Vintage Kopp Glass Clear Signal Lens 5 3/8 DIA RDL Railroad Industrial
Vintage Kopp Glass Lens Railroad Lantern @4 3/4" - w/ Alum. Bezel - 1 lense
Vintage Kopp Glass Red Railroad Signal Lens Smooth 5 3/8 L 3 1/2 F
Vintage Kopp Glass Amber Railroad Signal Lens Smooth AAR Tested 5 3/8 L 3 1/2 F
Vintage Kopp Glass Blue Railroad Signal Lens Smooth AAR Tested 5 3/8 L 3 1/2 F
