Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 227:
1929 (August 15 – September 4), Around the World Flight cover to Switzerland, franked by Zeppelin 2m ultra and three 4m black brown, cancelled by Friedrichshafen ”15.AUG.29” ds, red Flight marking and straight line confirmation, Friedrichshafen ”4.9.29” receiver, mostly VF, Sieger #30Ad, €500 without premium for franking, Est. $200-$250, Sc. #C36-37
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