Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1

Worldwide Zeppelin Flights - Bolivia

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Start price: $100

Buyer's premium:

1930 (June 30), Graf Zeppelin surcharge and overprints, 5c/10c, 10c, 15c, 25c and 1b used on registered cover from Cochamamba to NY, violet boxed cancellation, no backstamp, VF, C.v. $430 as for stamps off cover, Est. $150-$200 , Sc. #C11-12, C14-15, C18