1929 Cleveland-Detroit Amphibian Service Flight Cover. Cover with special "First Flight 'Over Lake Erie', Thompson Aeronautical Corp., Cleveland - Detroit Route. Amphibian Service 5-14-'29" cachet in purple, with additional "Amelia Earhart Special Pilot" straight line handstamp with signature of Amelia Earhart, franked with 2¢ Clark issue tied by Railway Express Agency boxed handstamp, reverse with air shipment tag, 1929 National Air Races promotion label and cachet, Very Fine, A rare signed Amelia Earhart flight cover and the only flight she flew over an official C.A.M. route. Estimate  $1,000 - 1,500. $0 (Image)