U.S.; Airmail, 1918, 16¢ Green, Plate Block of 6, #C2, n.h., top pl. #8900, Very Fine.
Scott $1,350.
Estimate $300-400. (Image)

Est. $300.00-400.00

U.S.; Airmail, 1918, 16¢ Green, Arrow Plate Block of 6, #C2, l.h., top pl# 8900, Fine to Very Fine.
Scott $900.
Estimate $220-270. (Image)

Est. $220.00-270.00

U.S.; Airmail, 1918, 16¢ Green on First Flight Cover, #C2, Air Mail Service Wash. Jul 15 1918 cancel, to Washington, DC; cover lightly aged, otherwise Very Fine.
Scott $800.
Estimate $250-300. (Image)

Est. $250.00-300.00

U.S.; Airmail, 1918, 16¢ Green on First Flight Cover, #C2, July 15, 1918 from Washington, DC to New York, opened at top and slight splitting at side, Very Fine.
Scott $800.
Estimate $150-200. (Image)

Est. $150.00-200.00

U.S.; Airmail, 1918, 24¢ Carmine Rose & Blue, "Grounded Plane", #C3 var., o.g., Fine. One of the "lower" ones out there. 2018 P.S.E. cert.
Estimate $1,500-2,000. (Image)

Est. $1,500.00-2,000.00

U.S.; Airmail, 1918, 24¢ Carmine Rose & Blue, "Grounded Plane", #C3, o.g., shallow thin, reperfed, Just Fine.
Estimate $200-250. (Image)

Est. $200.00-250.00

U.S.; Airmail, 1918, 24¢ Carmine Rose & Blue, #C3, l.h., low fast plane, light diagonal gum crease at lower left, Very Fine to Extremely Fine.
Estimate $100-150. (Image)

Est. $100.00-150.00

U.S.; Airmail, 1918, 24¢ Carmine Rose & Blue, Bottom Arrow Block of 4, #C3, n.h., fast plane, Fine to Very Fine.
Scott $520 as singles.
Estimate $100-150. (Image)

Est. $100.00-150.00

U.S.; Airmail, 1918, 24¢ Carmine Rose & Blue, Plate Block of 6, #C3, n.h., top pl #8492; right pair lightly toned, Fine+.
Scott $780 as singles.
Estimate $150-200. (Image)

Est. $150.00-200.00

U.S.; Airmail, 1918, 24¢ Carmine Rose & Blue on First Flight Cover, #C3, "Fast plane" tied by Washington May 15, 1918 duplex cancel, Boston May 17 receiving cancel on reverse, violet "Special delivery fee paid at Boston, Mass" cancel on front with hand written "Aeroplane Mail"; light edge wrinkles and cover tear at right, otherwise Fine and attractive.
Scott $750.
Estimate $150-200. (Image)

Est. $150.00-200.00

U.S.; Airmail, 1918, 24¢ Carmine Rose & Blue on 2 First Flight Covers, #C3, first tied by faint violet May 15, 1918 flight cancel, with original enclosure from Aerial League of America, edge wrinkles, otherwise fine; 2nd tied by violet May 15, 1918 New York flight cancel, to Delphi, IN, ink stains at left, otherwise fine to very fine, retail $950.
Scott $1,500.
Estimate $300-400. (Image)

Est. $300.00-400.00

U.S.; Airmail, 1923, Second Issue, 8¢-24¢ Complete FDCs, #C4-C6, nice examples with Washington, D.C. cancels, Very Fine.
Scott $1,750.
Estimate $500-600. (Image)

Est. $500.00-600.00

U.S.; Airmail, 1923, 16¢ Dark Blue, Block of 4, #C5, n.h., marginal pl. #, Fine.
Scott $480 as singles.
Estimate $100-150. (Image)

Est. $100.00-150.00

U.S.; Airmail, 1923, 16¢ Dark Blue, Plate Block of 6, #C5, n.h., large top pl. #14830, Fine.
Scott $2,000.
Estimate $400-600. (Image)

Est. $400.00-600.00

U.S.; Airmail, 1923, 16¢ Dark Blue, Plate Block of 6, #C5, n.h., large left pl. #14828; faint overall toning, otherwise, Fine.
Scott $2,000.
Estimate $400-600. (Image)

Est. $400.00-600.00

U.S.; Airmail, 1928, 10¢ Lindbergh Pane on FDC, #C10a, fine to very fine tied to registered Hotel Cleveland cover by Cleveland Midwestern Philatelic May 26, 1928 to Boston Mass., transit and receiving cancels on reverse. Realized $575 in our 2017 auction.
Scott $800.
Estimate $400-500. (Image)

Est. $400.00-500.00

U.S.; Airmail, 1930, Graf Zeppelin Complete, #C13-C15, n.h., nicely centered set, Very Fine to Extremely Fine, 2001 A.P.S. certs.
Scott $1,640.
Estimate $800-1,000. (Image)

Est. $800.00-1,000.00

U.S.; Airmail, 1930, Graf Zeppelin Complete, #C13-C15, n.h., nicely centered, a Very Fine set.
Scott $1,640.
Estimate $750-850. (Image)

Est. $750.00-850.00

U.S.; Airmail, 1930, Graf Zeppelin Complete, #C13-C15, n.h., Fine to Very Fine.
Scott $1,750.
Estimate $750-900. (Image)

Est. $750.00-900.00

U.S.; Airmail, 1930, Graf Zeppelin Complete, #C13-C15, n.h., Fine to Very Fine.
Scott $1,750.
Estimate $750-900. (Image)

Est. $750.00-900.00

U.S.; Airmail, 1930, Graf Zeppelin Complete, #C13-C15, n.h., 65¢ small gum skips, Fine to Very Fine.
Scott $1,750.
Estimate $700-850. (Image)

Est. $700.00-850.00

U.S.; Airmail, 1930, Graf Zeppelin Complete, #C13-C15, n.h., C14 pl. number single, C13 and C14 light gum crease, Fine or better.
Scott $1,640.
Estimate $600-700. (Image)

Est. $600.00-700.00

U.S.; Airmail, 1930, Graf Zeppelin Complete, #C13-C15, o.g., pl. # singles; small thin C15, a Very Fine set.
Scott $1,105.
Estimate $500-700. (Image)

Est. $500.00-700.00

U.S.; Airmail, 1930, Graf Zeppelin Complete, #C13-C15, n.h., C13 tiny surface scuff at left, C14 gum crease, a Fine to Very Fine set.
Scott $1,640.
Estimate $500-600. (Image)

Est. $500.00-600.00

U.S.; Airmail, 1930, Graf Zeppelin Complete, #C13-C15, used, 65¢ small thin, otherwise Fine to Very Fine.
Scott $1,050.
Estimate $450-550. (Image)

Est. $450.00-550.00