Airmail, 1930, $2.60 Graf Zeppelin. Large margin well centered single tied by "Varick Sta., N.Y., Apr 30, 1930" slogan machine postmark on flight cover, purple U.S. and red German flight cachets, green Lakehurst receiving backstamp, Very Fine and choice. Scott No. C15  Estimate $400 - 600. $0 (Image)