Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 51:
1924 (October 12-15), 3 Airship Z.R.3 First Flight covers from Germany to NYC, two addressed to US and one – to Canada, franked by Pigeon 100(pf) dull violet, cancelled by Friedrichshafen (Sep 9), Lörrach (July 19) or Zwickau (Sep 8) ds, each one with violet confirmation marking, ”Mit Luftpost” labels (Löerrach cover with official label above private one), F/VF, Est. $250-$300, Scott #C24
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