Lot
599 
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.
Realized: $500