Lot
3716 
[Airmail] Zeppelin and airmail flight covers, 1924-1929. 4 covers and two cards; including 1928-29 Graf Zeppelin flights including round the world and a Trans-Polar flight expedition card, also a better 1931 Wilkins Ellsworth Trans Arctic Submarine Expedition cover with 1920's 2¢ red + G.B. 1½d mixed franking. Estimate $250 - 350.
Realized: $210