Enamel pin badge commemorating the "Vlak Družby 1971" (Friendship Train 1971). This pin commemorates a specific instance of the "Friendship Train" program, which involved travel to the Soviet Union from Czechoslovakia during the Cold War era. These "Friendship Trains" were not just a means of transport, but also served as accommodation and often provided meals for participants. Travel to the USSR, even through such programs, was subject to strict oversight by state security, which had dedicated units for this purpose.
