Fire & Ice: Zeppelins, Aerophilately and the Titanic #643

Germany, Hindenburg, 1936, 1st & 2nd North America plus 5th South America Flights, cover with separate franking and onboard cancels of all three flights, sent by Clara Adams and signed by her, adding "Cabin 19" (unfortunately covered by 2nd & 3rd frankings), backstamped New York 9 May, after the first flight, and Rio de Janeiro 29 May, after the last, Very Fine, a unique souvenir of the famed "First Flighter".
Michel 12k, 14c, 16c. Sieger 406, 410.
Estimate $500 - 750.