Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Poland - Zeppelin Flights - 1932 (April 17-20), 3rd SAF postcard from Katowice to Brazil, franked by seven adhesives, including three air post values, tied ''11.IV.32'' ds, brown confirmation and red connection markings, Pernambuco''20.IV.32'' arrival hs is alongside, minor reversal ink soiling, mentioned for accuracy, otherwise VF and scarce, Sieger #150B, C.v. €900, Est. $300-$350, Scott #C5, C8