C16, Tied by Los Angeles Calif 23 Sept 1931 machine cancel on cach 25th Anniversary cover for the FIRST USA AIRMAIL FLIGHT. Has been autographed by EARLE OVINGTON (the Pilot for that flight) and FRANK HITCHCOCK (Postmaster General in 1911 under President Taft). VF. A great autographed cover (Image)

Estimate 200.00+ $Cdn

C18, Tied by New York 2 Oct 1933 duplex on GRAF ZEPPELIN flight cover with Dispatched From Friedrichshafen cachet. Has red triangular South America cachet with Rio de Janeiro b/s. VF (Image)

Estimate 150.00+ $Cdn

C18, Tied by Chicago "Century of Progress" slogan cancel 26 Oct 1933 on cacheted GRAF ZEPPELIN flight cover to Germany (rec b/s). VF (Image)

Estimate 125.00+ $Cdn