United States: Air Post . 6c orange Curtiss Jenny, top margin plate #9155 pair,. hinged in selvedge, slightly touching one stamp, the other never hinged, well-centered, very fine. (Sc. C1, $165 as singles). Mint H (Image1)

Est. US$75-100

United States: Air Post . 16c green Air Post,. tied to cover by New York NY. Madison Sq. Sta machine cancel (15 Jul), on first fight cover to Washington D.C., Madison Square corner card, fine. (Sc. C2, $800). Cover (Image1)

Est. US$300-400

United States: Air Post . 24c carmine rose & blue Curtiss Jenny,. lightly hinged, deep color, fresh and extremely fine; with 2013 P.S.E. certificate (XF-Sup 95. (Sc. C3, SMQ $300). Mint H (Image1)

Est. US$200-300

United States: Air Post . 24c carmine rose & blue Curtiss Jenny,. group of three, hinged, showing various positions of the Jenny, including one quite low (it with hinge remnant), overall fresh color and chiefly fine-very fine. (Sc. C3, $195 as normal singles). Mint H (Image1)

Est. US$75-100

United States: Air Post . 24c carmine rose & blue Air Post,. center line block of four, three stamps hinged, showing the "low flying Jenny" variety with the vignette significantly shifted downward, choice centering, visually striking, very fine. (Sc. C3var). Mint H (Image1)

Est. US$300-400

United States: Air Post . 16c dark blue Air Post,. used, with light cancellation, exceptional centering, extremely fine; with 2018 P.S.E. certificate (XF-Sup 95). (Sc. C5, SMQ $225). Used (Image1)

Est. US$100-150

United States: Air Post . 65c green Graf Zeppelin,. never hinged, superbly-centered, exceptional rich color, a stunning example for a collector seeking outstanding quality, extremely fine; with 2018 P.S.A.G. certificate graded "100". (Sc. C5, SMQ $225). Mint NH (Image1)

Est. US$2,000-3,000

United States: Air Post . 65c to $2.60 Graf Zeppelin,. used, well-centered, pleasing color, a lovely set of this popular issue, very fine. (Sc. C13-15, $1,050). Used (Image1)

Est. US$500-750

United States: Air Post . 65c to $2.60 Graf Zeppelin,. used, with matching Varick St. Sta NY APR 30 1930 machine cancels, the 65c and $2.60 showing portion of violet triangular Graf Zeppelin flight cachet, select centering, a pleasing set, very fine. (Sc. C14-16, $1,050). Used (Image1)

Est. US$500-750