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M. Oertle: Balkan - Bulgarian Airlines Boeing 737-53A LZ-BOA "City of Sofia"
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M. Oertle: Aeroflot (Balkan - Bulgarian Airlines) CCCP-85591
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M. Oertle: Balkan - Bulgarian Airlines Tupolev Tu-154B-2 LZ-BTS
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M. Oertle: Balkan - Bulgarian Airlines LZ-BTZ "without titles"
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M. Oertle: Balkan - Bulgarian Airlines Tupolev Tu-134A-3 LZ-TUZ