C13, 1930 65c Graf Zeppelin, fresh color and bright white paper, lightly-hinged original gum, an attractive stamp, 2017 PSE certificate graded XF-Sup 95 (SMQ $300) (Image)

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C14, 1930 $1.30 Graf Zeppelin, tied by April 29, 1930 Varick St. Sta. New York machine cancel to picture postcard to Philadelphia, all appropriate cachets, light toning on perforation tips, fine (Scott $390) (Image)

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C14, 1930 $1.30 Graf Zeppelin, tied by Lakehurst May 30 flag cancel to cover to Newark, New Jersey, dual flight cachet "First Europe Pan-America Round Flight" and "Luftschiff Graf Zeppelin/Sudamerikafahrt 1930", with New York and Friedrichshafen backstamps, adhesive remnants on each side, otherwise fine (Image)

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C18, 1933 50c Green, never hinged plate #21178 block of six, natural gum skips, very fine and attractive (Scott $600) (Image)

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Air Post Issues Group, singles and blocks on dealer/auction house cards, numerous highlights include (all mint) C1 (4 plus block of four), C2 (6), C3 (3), C4-6, C7-12 plate blocks of six, BKC1, C13 (3), C14 (2), and C18 (2 blocks of four), considerable duplication among later issues, mostly fine to very fine, a clean and useful group (Scott $3,600+ for better items) (Image)

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