According to Wikipedia, radios manufactured between 1953 and 1963 had to have the CD (Civil Defense) symbols. Duck and cover!ArtSpooner said:Is anyone old enough to remember Conelrad? On every AM tuner there were two emergency stations designated by little deltas. In case of an emergency you were supposed to tune to one of these stations. They were 580 and 1280 I think. I'm a little fuzzy on the exact numbers. I'm trying to remember the last car I had, that had the Conelrad markings. When did they go away?