1924, C5, 16¢ dark blue, tied by Dayton, Ohio Oct cds, on cover adv Internation Air Races, McCook Air Field Oct 2-3-4 1924, to Cheyenne, Wyo BS Chicago Oct 4 & Cheyenne Oct 6 (Image)

Cat. US$48.00

C5, 16¢ dark blue, from Cheyennne, Wyo Jul 1 1924, to Hartford, Conn, reduced at left, file fold in center (Image)

Cat. US$48.00

Graf Zeppelin flight from Miami to Chicago Oct 6, 1933, violet flight cachet (Image)

Cat. US$40.00

1933, A.M. No 9, unusual Change of Terminal cachet on 8¢ airmail entire canceled Air Mail Field, Detroit, Mich Apr 1 1933, addr to Washington, DC (Image)

Cat. US$15.00