1930 Graf Zeppelin Complete, well centered single of each on separate Apr. 29, 1930 flight cover with appropriate purple U.S. and red German flight cachets; 65¢ on post card to Germany, $1.30 and $2.60 on covers to Germany; each with overall toning just affecting stamps, Fine. Scott No. C13-C15  $1,200. $0 (Image)