Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 122:
ZEPPELIN FLIGHT : 1933 (October 14-17), Chicago Zeppelin Flight registered cover on shoulder from Germany to Brazil, franked by two stamps, Berlin-Friedrichshafen connection (on reverse) and confirmation markings in red, Pernambuco ”17.X.33” arrival ds, VF and scarce, Sieger #238, €850++, Est. $350-$400, Sc. # 84, 97
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