Vintage blue signal lens by Kopp Glass featuring heavy prismatic optics and embossed markings including “KOPP GLASS RL 4364.” Believed to be associated with railroad, transportation, or industrial signaling equipment. Displays beautifully with light and makes an excellent collectible or steampunk décor piece. I have additional coordinating signal lenses available in my store. CONDITION: Very good vintage condition with light scratches, edge wear, and age-related signs of use consistent with vintage industrial glass. Bubbles inside glass, but no chips or cracks noted. See photos for details. railroad signal lens, kopp glass, blue fresnel lens, industrial lighting, train signal, steampunk decor
