Airmail, 1918, 6¢ orange (Scott C1), near perfect centering, bright fresh color, o.g., very lightly hinged, Extremely Fine and choice, with 2017 P.S.E. certificate graded XF 90. SMQ $90. Scott $55
Est. $60-80 (Image)

Scott $55
Est. $60-80

Airmail, 1918, 16¢ green (Scott C2), gem centering that is just about perfect, a beauty! o.g., lightly hinged, Extremely Fine to Superb, with 2017 P.S.E. certificate graded XF-SUP 95. SMQ $150. Scott $60
Est. $100-150 (Image)

Scott $60
Est. $100-150

Airmail, 1923, 16¢ dark blue (Scott C5), exceptionally well centered, a beauty! o.g., lightly hinged, Extremely Fine. Scott $60
Est. $50-75 (Image)

Scott $60
Est. $50-75

Airmail, 1923, 24¢ carmine (Scott C6), essentially perfect centering within oversized margins, o.g., previously hinged, Extremely Fine and choice, with 2017 P.S.E. certificate graded XF 90J. SMQ $130. Scott $65
Est. $75-100 (Image)

Scott $65
Est. $75-100

Airmail, 1923, 24¢ carmine (Scott C6), a wonderfully choice lightly canceled jumbo margins gem, Very Fine to Extremely Fine, with 2017 P.S.E. certificate graded VF-XF 85J. SMQ $65. Scott $28
Est. $40-60 (Image)

Scott $28
Est. $40-60

Airmail, 1928, 10¢ Lindbergh (Scott C10a), booklet pane of 3, o.g., 2 stamps never hinged; missing top selvage, Fine to Very Fine. Scott $70
Est. $30-40 (Image)

Scott $70
Est. $30-40

Airmail, 1930, 5¢ Winged Globe (Scott C12), a select one-in-a-million gem, o.g., never hinged, Superb. Scott $18
Est. $40-60 (Image)

Scott $18
Est. $40-60

Airmail, 1931, 5¢ Winged Globe, rotary (Scott C16), plate number single, a select example for the connoisseur, o.g., never hinged, Superb. Scott $9
Est. $30-40 (Image)

Scott $9
Est. $30-40

Airmail, 1938, 6¢ Eagle (Scott C23), a magnificent gem that is perfect in every respect, o.g., never hinged, Superb. Est. $30-40 (Image)

Est. $30-40

1930 (June 2), Europe-Pan America Round Flight, Sevilla-Friedrichshafen, with all proper postmarks and cachets, Fine to Very Fine. Sieger 64 K. Est. $40-60 (Image)

Est. $40-60

1936 (May 11), Hindenburg 1st North America Flight, illustrated cover to Frankfurt, with all proper postmarks and cachets. Reverse shows Zeppelin Frankfurt arrival datestamp, Very Fine. Sieger 409. Est. $50-75 (Image)

Est. $50-75

1936, First American Rocket Airmail Flight, from Greenwood Lake NY to Hewitt NJ, red Rocket label, Very Fine. Est. $40-60 (Image)

Est. $40-60