1918 24c carmine rose and blue, top margin double plate number block of twelve, n.h., fresh color, fine-v.f., cat. $2000 (Cat No. C3) (Image)

Cat. $2000, Est.US$750

1923 16c dark blue, block of four, n.h., well centered, natural gum skips, with 2021 PFC for a block of eight from which this originated, cat. $480 (Cat No. C5) (Image)

Cat. $480, Est.US$150

1927 20c yellow green, n.h., near perfect centering, with 2020 PSAG certificate graded "98" (SMQ $275) (Cat No. C9) (Image)

Est.US$200

1927 10c Lindbergh, two unexploded booklets of two panes each, n.h., fine-v.f. (Cat No. C10a) (Image)

Est.US$150

1928-52 selection of sheets, including 5c Beacon, sheet of 50, separated in the middle (two stamps with minor faults), also 6c Eagle, 8c and 30c Winged Globe, 80c Hawaii, plus two different 16c Air Post Special Delivery, n.h., fine-v.f. (Cat No. C11,17,23-24,46,CE1-) (Image)

Est.US$250

1928-52 5c Beacon, seven top Plate No. Blocks of six, various combinations, also 5c Winged Globe, top and bottom Plate No. Blocks of six, n.h., well centered, fine-v.f., cat. $762 (Cat No. C11,12) (Image)

Cat. $762, Est.US$150

1930 Zeppelin, set of three, n.h., well centered, v.f., cat. $1675 (Cat No. C13-15) (Image)

Cat. $1675, Est.US$750

1930 65c green, n.h., well centered, with 2020 PFC graded "VF-XF 85" (SMQ 350) (Cat No. C13) (Image)

Est.US$250

1930 $1.30 brown, l.h., well centered, with 2021 PFC graded "XF 90" (SMQ $400) (Cat No. C14) (Image)

Est.US$300

1930 $1.30 brown, right margin single, well centered, with 2021 PFC graded "XF 90" (SMQ $800) (Cat No. C14) (Image)

Est.US$600

1930 $2.60 blue, barest trace of a hinge, near perfect centering, fresh color, with 2021 PSAG certificate graded "98" (SMQ $1,300) (Cat No. C15) (Image)

Est.US$500

1930 $2.60 blue, n.h., well centered, bright color, with 2021 PFC graded "XF 90" (SMQ $1,250) (Cat No. C15) (Image)

Est.US$900

1933 Century of Progress, 50c green, n.h., well centered, with 2016 PSE certificate graded "XF-Sup 95" (SMQ $180) (Cat No. C18) (Image)

Est.US$150

1933 Century of Progress, 50c green, bottom margin plate number block of six, n.h., v.f., cat. $600 (Cat No. C18) (Image)

Cat. $600, Est.US$200

1933 Century of Progress, 50c green, sheet of 50, n.h., well centered, fresh, mostly v.f., cat. $4125 (Cat No. C18) (Image)

Cat. $4125, Est.US$1,000

1938 6c ultramarine & carmine, Top Plate No. block of four, n.h., v.f., each stamp with penciled position and signed Herbert Bloch, etc., cat. $1750 (Cat No. C23c) (Image)

Cat. $1750, Est.US$750

1963 80c unexploded booklet on pink cover, Slogan 3, n.h., v.f., cat. $500 (Cat No. BKC17) (Image)

Cat. $500, Est.US$200

1968-73 10c, 11c and 13c imperforate horizontal pairs, n.h., v.f., cat. $755 (Cat No. C73a,82a,83a) (Image)

Cat. $755, Est.US$300

1985 Aviation Pioneers, 33c imperforate vertical pair, n.h., v.f., cat. $500 (Cat No. C113a) (Image)

Cat. $500, Est.US$200

1985 Fr.Junipero Serra, 44c imperforate horizontal pair, n.h., v.f., cat. $950 (Cat No. C116a) (Image)

Cat. $950, Est.US$350

1930 (16 Sep) New York to Southampton by S.S. "Europa", First Catapult flight, from there to Friedrichshafen and via Graf Zeppelin to Mannheim, cover franked with 20c Air Post and 50c Regular Issue, tied by cds, with appropriate cachets, transit and arrival pmks, fine and scarce Catapult/Zeppelin combination (this cover should not have been accepted by the U.S. Post Office, since the U.S. government had no arrangement with Germany for the acceptance of mail for the various European trips of the Airship. Similarly, the German Post Office should not have accepted this item without the additional German franking) (Image)

Est.US$500

1929 (29 Sep) United States 5c Beacon, used on cover, endorsed "this cover was carried to Seattle, Wash. on Russian Airplane "Land of the Soviets", through the courtesy of Commander Shestakoff", signed Chass A. Sheldon, Postmaster, Seward, Alaska, addressed to Seattle, with Oct.14 arrival pmk on back, fine. Only 10 covers were carried on the "Land of the Soviets" from Seward (Cat No. AAMC 1095b) (Image)

Est.US$500

1931 (5 Oct) 1931, 5c stationery entire envelope flown from Seattle to Divernon, Ill., with "Pangborn & Herndon First Trans-Pacific Hop. 7 AM. Wenatchee" handstamp, fine (Image)

Est.US$150

1932 Mattern & Griffin Round the World Flight, cover franked with U.S., German and Russian adhesives, bearing appropriate postmarks and autographed by both fliers, light adhesive toning, otherwise v.f., with 1987 PFC. The U.S. pilot Jimmy Mattern, with Lt. Griffin attempted to beat the "round-the-world" record, held at the time by Post and Gatty. After flying from New York via Harbour Grace, they landed in Berlin and later reached Moscow. Their plane crashed up on the way to Siberia. Only a handful of covers carried on this flight (Cat No. AAMC TO1167) (Image)

Est.US$750

1937 (14 July) World Record Non-stop Transatlantic flight, Moscow-San Jacinto, by Soviet aviators Gromov, Danilin and Yumashev on their long-distance record flight via the North Pole. The airplane was a single-engine ANT-25-1 which flew 6262 miles in 62 hours and 17 minutes, fine cover with photo cachet and San Jacinto pmks (Image)

Est.US$250