Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Yugoslavia - Zeppelin Flight - 1932 (May 2-5), 4th SAF cover to Argentina, franked by three King Alexander definitives, tied by triangle Zagreb ''29.IV.32'' postmark, Friedrichshafen ''2.5.32''connection and orange confirmation markings, Buenos Aires arrival ds, F/VF, Sieger #157, C.v. €350, Est. $300-$350, Scott #69, 71, 75