1924, eingeschriebener Flugpostbrief vom 27.VI. von Prag nach Belgrad frankiert mit Flugpostaufdruckmarken 50 auf 100 H, 100 auf 200 H, 250 auf 400 H und Befreite Republik Paar 30 + 50 H, Flugetickette "Prague à Belgrade", Mi. 172,175,199,200,201, Trojan 4800 Kr
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