Postal Flight Palermo - Napoli, small cover with 2 special stamps both cancelled "POSTA AEREA - PALERMO CONTINENTE 28.6.17" flown to Venezia, arrival Portogruaro/Venezia 1917-07-01 (Longhi 17PNb / 877)
6; Flugpost; FLUGPOST INTERNATIONAL; Italien
6; Airmail; INTERNATIONAL AIRMAIL; Italy