A group of railroad signal lenses including six 8 3/8" glass lenses. Corning lenses include two red, one amber, and one green. Two blue Kopp lenses. Six 5 3/8" diameter glass lenses includes two red Kopp, one red Corning, one blue Kopp, one blue Corning, and orange Corning lens, and one orange plastic lens by General Signals. Lenses range from new old stock to minor chips on the edges, scratch marks, and some wear. Two retaining rings measuring 5 1/2" and 4 3/4" show general signs of use with paint wear and rust. See photos for best description.