Polar Flight of the dirigible "Norge", flown on the entire trip to Teller, Alaska, flight vignette tied to flown cover by the oval flight cachet, this has two Italian adhesives tied by the "Teller/Alaska/May 13, 1926" four-bar c.d.s. that was applied on the front of all covers that made the entire trip, this also has a scarce boxed cachet for the flight and is signed by Ettore Arduino, very fine and rare cover (only 35 known), certified Bolaffi
6; Flugpost; FLUGPOST INTERNATIONAL; Italien