1918-23 complete sets, 6c, 24c Jenny and 16c green n.h., others l.h., fine-v.f., cat. $502 (Cat No. C1-6) (Image)

Cat. $502, Est.$150

1918-23 6c-24c blocks of four, hinged at top, bottom stamps n.h., fresh and well centered, fine-v.f. (Cat No. C1-6) (Image)

Est.$500

1918 24c carmine & blue, Top Plate No. block of four, plate shifted to left, h.r., fine-v.f. (Cat No. C3) (Image)

Est.$250

1923 8c-24c blocks of four, hinged at top, bottom stamps n.h., fresh and well centered, fine-v.f. (Cat No. C4-6) (Image)

Est.$250

1927-30 10c booklet pane of three (2) and 50c Century of Progress, block of four with Plate No. at bottom, n.h., v.f., cat. $530 (Cat No. C10a,C18) (Image)

Cat. $530, Est.$250

1930 Zeppelin 65c-$2.60 set of three, n.h. but each with a small thin, well centered, fresh, fine-v.f. (Cat No. C13-15) (Image)

Est.$500

1930 Zeppelin, set of three, n.h., fine-v.f., cat. $1640 (Cat No. C13-15) (Image)

Cat. $1640, Est.$750

1930 Zeppelin set of three, used on card and two covers, various markings, minor cover flaws, fine-v.f. (Cat No. C13-15) (Image)

Est.$500

1930 Zeppelin 65c (3) and $1.30 (5), used on six covers of cards, various pmks and destinations, some wear and tear, mostly fine-v.f. (Cat No. C13,14) (Image)

Est.$500

1930 $2.60 blue, left plate number single, n.h., v.f., with 2017 PFC, cat. $850 (Cat No. C15) (Image)

Cat. $850, Est.$600

1930 Zeppelin, $2.60 blue, used with additional franking on May 5 New York Round-Flight cover, fine-v.f., with appropriate cachet and Lakehurst arrival pmk (Cat No. C15) (Image)

Est.$300

1930 Zeppelin, $2.60 blue, used on May 7 New York Round-Flight cover, fine-v.f., with appropriate cachet and Lakehurst arrival pmk, addressee's name obliterated, fine-v.f. (Cat No. C15) (Image)

Est.$300

1933 Century of Progress, 50c green, 12 copies used on three covers, each with Chicago Flight cachet, two stamps defective, others fine-v.f. (Cat No. C18) (Image)

Est.$150

1937 50c carmine, 15 sheets of 50, n.h., fine-v.f. (counted as singles) cat. $8250 (Cat No. C22) (Image)

Cat. $8250, Est.$750

1934 cover with U.S. and Polish franking, special cachet and signed by both Adamowicz brothers, faint toning, otherwise v.f. On June 28, Benjamin and Joseph Adamowicz took off from Floyd Bennett Field in NYC and landed in Harbour Grace, Newfoundland. The next day, they took off from there for a Trans-Atlantic trip. Through mechanical problems, leaking engine and heavy rainstorm, they managed to reach Europe (near Caen in France). The next day, after repairing a landing gear, they took off to Paris, then to Germany, where they were forced to land due to fuel leaks. On July 2, the brothers arrived in Warsaw, Poland, treated as heroes. The Adamowicz brothers were possibly the first amateur pilots in the world to fly a plane across the Atlantic (Image)

Est.$150