1918 16c green, l.h., well centered with wide margins, fresh color, with 2017 PSE certificate graded "XF-Sup 95" (SMQ $150) (Cat No. C2) (Image)

Est.$100

1918 24c carmine rose and blue, n.h., well centered with wide margins fresh color, with 2019 PSAG certificate graded "98" (SMQ $1,500) (Cat No. C3) (Image)

Est.$850

1918 24c carmine rose and blue, bottom margin arrow block of four, n.h., nice color, v.f., with 2019 PFC (catalogue value for singles) cat. $520 (Cat No. C3) (Image)

Cat. $520, Est.$150

1923 16c dark blue, left sheet margin plate block of six, n.h., well centered, v.f., with 2020 PFC, cat. $2000 (Cat No. C5) (Image)

Cat. $2000, Est.$1,000

1923 24c carmine, n.h., well centered with wide margins, beautiful color, with 2020 PSAG certificate graded "98" (SMQ $1,200) (Cat No. C6) (Image)

Est.$800

1927 20c yellow green, lightly cancelled, well centered with jumbo margins, with 2020 PSE certificate graded "Superb 98J" (SMQ $500) (Cat No. C9) (Image)

Est.$250

1928 10c Lindbergh booklet pane of three, fine, used May 26, 1928 Cleveland Midwestern Philatelic Station FDC to Dearborn, attractive cachet and markings, v.f., cat. $800 (Cat No. C10a) (Image)

Cat. $800, Est.$250

1930 Zeppelin, 65c-$2.60, set of three on card (65c) and two covers, with all appropriate cachets and markings, fine-v.f., cat. $1110 (Cat No. C13-15) (Image)

Cat. $1110, Est.$350

1930 $1.30 brown, used, well centered, with 2018 PFC graded "XF 90" (SMQ $625) (Cat No. C14) (Image)

Est.$400

1930 $2.60 blue, used, well centered amid large margins, v.f., cat. $550 (Cat No. C15) (Image)

Cat. $550, Est.$150

1933 50c green, top plate No. Block of six, h.r., fine-v.f., cat. $475 (Cat No. C18) (Image)

Cat. $475, Est.$150

1933 50c green, bottom plate number block of six, n.h., v.f., cat. $600 (Cat No. C18) (Image)

Cat. $600, Est.$200

1938 6c dark blue and carmine, sheet margin vertical pair, imperf. horizontally, n.h., with 2019 PSAG certificate graded "90" (unpriced in SMQ) cat. $300 (Cat No. C23a) (Image)

Cat. $300, Est.$500

1941-46 6c carmine, 8c olive green and 5c carmine, n.h., each PSE encapsulated and graded "Superb 98" (SMQ $390) (Cat No. C25-26,C32) (Image)

Est.$200

1988 Igor Sikorski, 36c error, red, dark blue and black omitted, n.h., v.f., with normal for comparison, cat. $1150 (Cat No. C119a) (Image)

Cat. $1150, Est.$300

1912 (Jan 28) Aeroplane Station 1c stationery card, also Aug 12 picture postcard "Plantation, N.J." Via Aeroplane, minor toning, fine-v.f. (Image)

Est.$250

1929 6c orange, 8c green, blocks of four used on 4c stationery entire envelope flown on the first Round-the-World flight from Los Angeles to Lakehurst, fine-v.f. (Cat No. C1,4) (Image)

Est.$150

1929 6c, 16c and 24c, each used in 1929 on small stationery entire envelope from Miami to Belize, British Honduras, First Flight (San Juan-Paramaribo and FAM cachets), fine-v.f. (Cat No. C1-3) (Image)

Est.$150

1933 Darius-Girenas Transatlantic flight cover franked with 3c Newburgh, tied by Brooklyn July 15 cds, also "Lituanica" and corresponding violet cachets, signed by both fliers, Kaunas July 18 arrival pmk on back, v.f. (Image)

Est.$300

1930 $1.30 and $2.60 Zeppelin, used on May 7, 1930 "Europe Pan-America Round Flight" cover to Bremen, with corresponding cachets, including South America in red, also "This Article Made The Complete Round Flight via Graf Zeppelin", Friedrichshafen (6.6.30) pmk on back, tiny corner perf. stain at upper right, otherwise fine and attractive cover (Cat No. C14,15) (Image)

Est.$300

1936 50c green, tied by May 9, 1935 Third International Philatelic Exhibition cancel on cacheted L.Z. 129 Hindenburg cover, flown on the airship to Germany, with Frankfurt arrival pmk on back, faint overall toning, fine and unusual example of 50c Century of Progress stamp used on a Hindenburg flight (Cat No. C18) (Image)

Est.$100