Airmail, 1930, $1.30 Graf Zeppelin. Tied by "Chicago, Ill, Air Mail, May 27, 1930" duplex postmark on flight cover to Basel, Switzerland, additionally franked with Switzerland 1fr Aimail tied by Chicago postmark, U.S. and German flight cachets and Friedrichshafen transit backstamp, cover slightly reduced at top, Very Fine, a very scarce mix franking. Scott No. C14  Estimate $1,000 - 1,500. $0 (Image)

Airmail, 1930, $1.30 Graf Zeppelin. Vertical strip of three tied by "New York, Warwick St. Sta., May 6, 1930" duplex postmarks on legal size flight cover, U.S., German and round trip flight cachets, Friedrichshafen and New York transit backstamps, Very Fine. Sieger No. 64BII. Scott No. C14  Estimate $500 - 750. $0 (Image)

Airmail, 1930, $1.30 Graf Zeppelin. O.g., never hinged, nicely centered, strong color, fresh and Very Fine. Scott No. C14  $800. $0 (Image)