1918 6c orange, top margin plate block of six, n.h., pencil notation in selvage, fine-v.f., cat. $1000 (Cat No. C1) (Image)

Cat. $1000, Est.$200

1918 16c green, top Plate no. Arrow block of six, n.h., one stamp with faint fingerprint and pencil notation at top margin on back, v.f., cat. $1350 (Cat No. C2) (Image)

Cat. $1350, Est.$300

1918 24c carmine rose & blue, top arrow, double plate nos. 8493/8492 and double "Top" block of twelve, well-centered, bright colors, hinged in margins only, stamps n.h., fine-v.f., cat. $1250 (Cat No. C3) (Image)

Cat. $1250, Est.$500

1923 8c dark green, bottom margin plate block of six, n.h., nicely centered, pencil notation in ungummed portion of selvage, v.f., cat. $330 (Cat No. C4) (Image)

Cat. $330, Est.$100

1923 16c dark blue, top margin plate block of six, n.h., fine-v.f., cat. $2000 (Cat No. C5) (Image)

Cat. $2000, Est.$500

1923 24c carmine, bottom margin plate number block of six, beautiful color, n.h., fine-v.f., cat. $2500 (Cat No. C6) (Image)

Cat. $2500, Est.$1,000

1930 Zeppelin, 65c-$2.40, bottom plate number set of three, $1.30 l.h., other two n.h., well centered, v.f., cat. $1425 (Cat No. C13-15) (Image)

Cat. $1425, Est.$500

1930 65c green, left margin plate number block of six, top stamps l.h., balance n.h., well centered, v.f., cat. $1500 (Cat No. C13) (Image)

Cat. $1500, Est.$400

1933 Century of Progress 50c green, bottom sheet margin Plate No. Block of six, n.h., natural gum skips at bottom, fine-v.f., cat. $675 (Cat No. C18) (Image)

Cat. $675, Est.$250

1930 (15 June) "Bremen" Amsterdam-Bremenhaven flight cover with 20c franking, previously flown on Europe-Pan-America Round Flight Zeppelin dispatch ($2.60 franking removed), with all original cachets and arrival markings, some cover wear and tear, undoubtedly most unusual re-used Zeppelin cover (Image)

Est.$500

1932 (Aug 4) Germany-Iceland-Canada-USA Transatlantic flight Wolfgang Von Gronau, cover with Canadian, USA, Philippines, Japan, Netherlands Indies, Ceylon and Indian adhesives, canceled at their prospective stops, including Unalaska, Alaska (Aug 29) pmk, v.f., signed by Von Gronau (Image)

Est.$1,500

1935 (21 Sep) Felix Vaitkus' Trans-Atlantic attempt, cover franked with US 6c orange and Lithuania special overprinted adhesive, also two additional stamps on back, tied by Kaunas (31 Oct) return trip to Chicago, numbered "90" and signed by Lt. Felix Vaitkus, with violet cachet, registry handstamp and other appropriate markings, fine-v.f. (Image)

Est.$750

1943-44 U.S.S. Barbero, 17 mostly different cacheted covers, franked with 3c "Win the War" or other contemporary adhesives, fine-v.f. (Image)

Est.$250

1959 (8 June) U.S.S. Barbero Missile Mail cover with "First Official Missile Mail" cachet and official enclosure, franked with 2x4c Flag, addressed to Salisbury, Rhodesia & Nyasaland, with Jacksonville, FL arrival, v.f. and rare (Cat No. 25C1) (Image)

Est.$750

1959 (8 June) U.S.S. Barbero Missile Mail cover with "First Official Missile Mail" cachet and official enclosure, franked with 4c Flag, unaddressed, with "Sample Copy for Reproduction Purposes only" handstamp on back, v.f. (Cat No. 25C1) (Image)

Est.$500

1959 U.S.S. Barbero June 8 cover with "First Official Missile Mail" cachet and official enclosure, with Jacksonville, FL arrival, v.f. (Cat No. EZ 25C1) (Image)

Est.$500

1959 (8 June) U.S.S. Barbero Missile Mail Cover collection with collateral material included, with 3xBarbero covers including type I (x2), type II (minor cover faults), also two different Barbero patches, reports, photos, folder with newspaper clippings, various covers and other material (Cat No. 25C1-D1) (Image)

Est.$1,500