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Airmail, 1923, 8¢ dark green, large die proof (Scott C4P1), on die-sunk card reduced to approximately 148 x 121 mm, handstamped on the reverse, "Engraver's Stock Proof, Authorized by (signed)" along with control no. 624648A; small, inconsequential rust stain on the reverse, still Very Fine. Scott $4,750. Estimate $1,500 - 2,000. (Image)
Airmail, 1923, 16¢ dark blue, large die proof (Scott C5P1), on die-sunk card reduced to approximately 138 x 122 mm, handstamped on the reverse, "Engraver's Stock Proof, Authorized by (signed)" along with control no. 624644A; small, inconsequential rust stain on the reverse; bit of very faint foxing, otherwise Very Fine. Scott $4,750. Estimate $1,500 - 2,000. (Image)
1933, 50¢ "Chicago" Zeppelin, seven stamp size photo essays of unaccepted designs (Scott C18-E), one very similar to the accepted design, mounted on a display page with a block of 4 of the issued stamp (bottom stamps never hinged) and including an additional explanatory page, Very Fine, Ex-Alvin Hall. Estimate $1,500 - 2,000. (Image)
1959, 10¢ Pan-American Games, Designer's original drawings (Scott C56-E), six different designs including one very close to the issued stamp; all executed in pencil, Sharpie and ink on tracing paper about 3" x 4"; each lightly adhered to a thick white mat board about 7" x 8½"; all signed in Sharpie on the reverse by the designer, Suren Ermoyan, Very Fine. A unique set for a Sports topicalist. Estimate $750 - 1,000. (Image)