Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 309:
AIRSHIP ”HINDENBURG” FLIGHT: 1936 (May 5-9), 1st NAF cover to USA, franked by two stamps, tied by ”4.5.36” Vatican City ds, uprated by two Italian values, Friedrichshafen ”5.5.36” connection, flight cachet in red (letter ”c” for Frankfurt), NYC ”May.9.1933” receiver, mostly VF and scarce, Sieger #406, €700, Est. $500-$600, Sc. #22, 41
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