It is franked by a nice US C-14 and was flown on the 1930 South American flight. The item “Flown Graf Zeppelin Niagara Falls post card franked by a nice US C14″ is in sale since Monday, August 19, 2019. This item is in the category “Stamps\United States\Covers\Postal History”. The seller is “newarkstampandcoinexchange” and is […]