COLLECTION OF ZEPPELIN FLOWN CANCELLED COVERS: A nice collection of cancelled air mail, zeppelin flown and first day covers in a binder. Zeppelin covers to include the first Hindenburg trans-Atlantic flight, USS Akron, USS Macon, Graf Zeppelin and several German covers. Sold with a few Air Mail and first day covers of Francis Scott Key and Washington Irving. Approx. 75 covers total.