Airmail, 1930, $1.30 & $2.60 Graf Zeppelins, tied by "Varick St. Sta., New York, Apr 30, 1930" duplex postmarks on 5¢ airmail flight entire, purple U.S. and red German flight cachets with additional circular round flight handstamp at bottom left, Very Fine. Scott No. C14-C15  Estimate $500 - 750. $0 (Image)