This is the old Civil Defense Logo that was used from the 1930s to 2008. It was a pretty common sight on Cold War-era equipment and supplies (e.g., air-raid sirens, radiation meters, and even on many a truck used in rescue operations). It was also common on test cards for the old Emergency Broadcast System on some TV stations. #Air_Raid #CD #Civil_Defemse #Cold_War #Logo #Nuclear #radiation_meters
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