1936 (27 Oct) first flight Lwow-Haifa, with bilingual "Poland-Palestine" cachets, Haifa arrival pmk, also 1938 Warszawa-Kaunas, registered first flight to Lithuania; plus Stratosphere Balloon souvenir sheet (Scott B31) used on back of flown cover from Zakopane-Warszawa to Lwow, fine-v.f. (Image)

Est.$200

1937 Balloon Championships, collection of nine different "Poczta Balonowa" covers, including "Goplo", "Katowice", "Pomorze", "Sanok", "Syrena", "Legjonowo", "Lodz", "Gryp" and "Katowice", each with appropriate markings and franking, fine-v.f., rare assembly (Fi.22a/22j, 5,600zl) (Image)

Est.$750