The SWL QSL Card Museum Bulgaria Europe Radio Sofia - 1968(6), 1970, 1978, 1992, Radio Bulgaria Contest Announcement QSL Contributed by Bob Davidson (USA) Radio Sofia - 1968 QSL Contributed by Istvan Kiss (Hungary) Radio Sofia - 1968 QSL Contributed by Istvan Kiss (Hungary) Radio Sofia - 1968 QSL Contributed by Istvan Kiss (Hungary) Radio Sofia - 1968 QSL Contributed by Istvan Kiss (Hungary) Radio Sofia - 1968 QSL Contributed by Istvan Kiss (Hungary) Radio Sofia - 1970 QSL Contributed by Istvan Hegedus (Hungary) Radio Sofia - 1978  QSL Contributed by Bill McDavitt Radio Sofia - 1992 QSL Contributed by Boris Chastoedov (Russia) Radio Bulgaria Contest Announcement Contributed by Bob Davidson (USA)