1918 24c carmine rose and blue, vignette slightly shifted to the right ("slow plane"), Top Plate No. 8492 block of four, used, fine-v.f. (Cat No. C3var) (Image)

Est.US$150

1923 8c dark green, n.h., near perfect centering, fresh color, with 2023 PFC graded "S 98" (SMQ $500) (Cat No. C4) (Image)

Est.US$200

1923 16c dark blue, bottom margin plate number block of six, n.h., well centered, v.f., with 2023 PSE certificate, cat. $2000 (Cat No. C5) (Image)

Cat. $2000, Est.US$1,200

1924-31 24c carmine, block of four, 10c Lindbergh booklet pane of three, also 50c Century of Progress (2), n.h., fine-v.f., cat. $785 (Cat No. C6,10a,18) (Image)

Cat. $785, Est.US$250

1927 20c yellow green, n.h., near perfect centering, with 2019 PSE certificate graded "Superb 98" (SMQ $300) (Cat No. C9) (Image)

Est.US$150

1927 20c yellow green, n.h., near perfect centering, with 2021 PFC graded "Superb 98" (SMQ $300) (Cat No. C9) (Image)

Est.US$150

1927 10c Lindbergh, 20 booklet panes of three, n.h., mostly well centered, fine-v.f., cat. $2300 (Cat No. C10a) (Image)

Cat. $2300, Est.US$250

1927 10c Lindbergh, 5 booklet panes of three, also six unexploded booklets, each with two panes, n.h., mostly well centered, fine-v.f., cat. $1980 (Cat No. C10a) (Image)

Cat. $1980, Est.US$250

1927 10c Lindbergh, 10 unexploded booklets, each with 2 panes of three, n.h., fine-v.f., cat. $2300 (Cat No. C10a) (Image)

Cat. $2300, Est.US$500

1927 Lindbergh, three 10c booklet panes of three, each used with additional franking on covers flown from Philadelphia to Bombay, India, Melbourne, Australia, Auckland, New Zealand, fine-v.f., each with arrival markings (Cat No. C10a) (Image)

Est.US$250

1930 Zeppelin, 65c-$2.60, set of three, h.r., usual natural gum wrinkles, fine-v.f., cat. $1080 (Cat No. C13-15) (Image)

Cat. $1080, Est.US$500

1930 Zeppelin, 65c-$2.60, set of three, h.r., well centered (especially $2.60, with wide margins all around), v.f., cat. $1080 (Cat No. C13-15) (Image)

Cat. $1080, Est.US$500

1930 Zeppelin, 65c-$2.60 set of three, n.h., post office fresh, v.f., cat. $1675 (Cat No. C13-15) (Image)

Cat. $1675, Est.US$750

1930 Zeppelin, 65c-$2.60 set of three, blocks of four, n.h., post office fresh, absolutely pristine, v.f., cat. $6700 (Cat No. C13-15) (Image)

Cat. $6700, Est.US$3,000

1930 Zeppelin, 65c-$2.60 set of three "Harry Ioor" cacheted card and two covers, Europe-Pan-America matching May 6, 1930 departure pmks, Lakehurst arrival markings on back, v.f., scarce set of Ioor cachets (Cat No. C13-15) (Image)

Est.US$500

1930 Zeppelin, 65c green, two copies used on flown Zeppelin postcard, round flight to Lakehurst, appropriate cachets, v.f. (Cat No. C13) (Image)

Est.US$150

1930 $1.30 brown, n.h., well centered, with 2024 PSE certificate graded "VF-XF 85" (SMQ $600) (Cat No. C14) (Image)

Est.US$400

1930 Zeppelin, $1.30 brown, used on Europe-Pan-America Round flight to Friedrichshafen, v.f., with 6.6.30 arrival pmk on back (Cat No. C14) (Image)

Est.US$150

1930 Zeppelin, $1.30 brown, two singles used on Round-Flight cover to Lakehurst, appropriate cachet and arrival pmk, v.f. (Cat No. C14) (Image)

Est.US$250

1930 $2.60 blue, n.h., well centered with wide margins, fresh color, with 2024 PSE certificate graded "XF-Sup 95" (SMQ $1,500) (Cat No. C15) (Image)

Est.US$1,200

1930 $2.60 Zeppelin, forgery of a large die proof in red, v.f. (Cat No. C15F) (Image)

Est.US$800

1930 $2.60 Zeppelin, forgery of a large die proof in violet, v.f. (Cat No. C15F) (Image)

Est.US$800

1933 50c green, five blocks of four (two with sheet margin Plate No. at bottom), two stamps l.h., others (18) n.h., mostly v.f. (catalogued as singles), cat. $1440 (Cat No. C18) (Image)

Cat. $1440, Est.US$500

1935 25c blue, n.h., perfectly centered, with 2013 PSE certificate graded "Gem 100" (SMQ $500) (Cat No. C20) (Image)

Est.US$200

1935 20c green, n.h., near perfect centering, with 2016 PSE certificate graded "Superb 98" (SMQ $750) (Cat No. C21) (Image)

Est.US$350