ITALIEN 1899, "Inaugurazione dell Acquedotto di Libano 24.9.1899", Sonderbildkarte mit dem Aquädukt von Libano und Heißluftballon, ab Belluno nach Milano (Frankatur fehlt), Attest Longhi (Longhi 18)
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ITALY 1899, "Inaugurazione dell Acquedotto di Libano 24.9.1899", special illustrated card showing the aqueduct of Libano with a balloon, sent from Belluno to Milano (stamp is missing), certificate Longhi
6; Flugpost; FLUGPOST INTERNATIONAL; Alphabetisch nach Ländern
6; Airmail; INTERNATIONAL AIRMAIL; Allgemein