1937 Austria Airmail Postcard Cover To Salzburg Maria Anna Ship Centenary
Commemorative postcard for Donau-Dampfschiffahrts-Gesellschaft (DDSG) -- the Danube Steamship Company -- franked with the 1937 DDSG commemorative issue stamp and tied by DDSG Schiffspost / Ship cancel of the steamer Franz Schubert.
