Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Iceland - Zeppelin Flight - 1931 (June 30-July 3), Iceland Return Flight cover, franked by complete Zeppelin set of three, tied by Reykjavik ''30.VI.31'' date stamps, green confirmation marking and Friedrichshafen ''3.7.31'' receiver on the back, mostly VF and rare complete set on one item, Sieger #114, C.v. €1,200, Est. $600-$800, Scott #C9-11