1930 Graf Zeppelin flight covers. 7 items, including C15 (2 covers), C14 (1 cover) & C13 (2 cards & 2 covers), all U.S.A. to Friedrichshafen and return to Lakehurst except one cover Lakehurst-Sevilla; red German and purple U.S. flight cachets, some with minor flaws and soiling, F.-V.F. lot. Scott No. C13-C15; $2,400 as used  Estimate $500 - 750. $0 (Image)