Air Mail cover 1914 (9 Dec.) Carpathian flight to Kassa by Capt. Wanneck, buff Feldpost card showing circular "K.u.K. Fliegerkompagnie No.11" cachet in violet. The only flight from the besieged Fortress to land in Hungary. Photo

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Air Mail cover 1914 (9 Dec.) Carpathian flight to Kassa by Capt. Wanneck, buff Feldpost card showing circular "K.u.K. Fliegerkompagnie No.11" cachet in violet. The only flight from the besieged Fortress to land in Hungary. Photo

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