In the 1970s if one requested a QSL from Radio Prague, they complied, and also sent this pre-printed postcard which was meant to be returned to Augusto Pinochet in Chile as a symbol of protest. The card goes along with a mimeographed sheet of further explanation (36300009). The card has the mark of a rusty paper clip on the reverse, and the price includes the card and the separate explanation.  Grade: 2