Here are some more radio QSL cards from the 1960s. Back then, if you heard a faraway AM radio station, you could write them and give details of what you heard, and they would send back their QSL card as confirmation. QSL actually came from ham radio, but stuck through to the AMs. If you missed Part 1 of the QSL cards, see them here. As always, click any pic for a larger version.