Civil Defense Non-Flammable Gas Poster. Material: paper. Size: 10 3/4" x 10 3/4". Description: 2 sided poster, side 1: green background; white print: "Non-Flammable Gas, 2, PL-3, Labelmaster, Chicago, IL 60660"; graphic of a container; side 2: black and green background; white print: "Empty, Non-Flammable Gas, 2, 2S-3, Labelmaster, Chicago, IL 60660."
