Italy 1952 Milan Aeronautical Exhibition Cover - LOTTO/40376AItaly 1952 Milan Aeronautical Exhibition Cover

22/9/1952 - ITALY, REPUBLIC - A cover to Padua with the postmark "Mostra dell'aeronautica Milano", from the helicopter mail experiments (the flight was suspended because the helicopter broke down), franked with a 4 Lire Democratica (554) and a 1 Lira Italia al Lavoro (635). A folded letter intended for the postal experiment - Lotto/40376A