Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Poland - Zeppelin Flights - 1932 (May 2-5), 4th SAF illustrated stationery card of 15g green, sent from Warsaw to Brazil, uprated by nine air post stamps (two blocks of 4 on the back), tied ''26.IV.32'' ds, confirmation and connection markings in red, Pernambuco''5.V.32'' arrival ds on reverse, VF and scarce, Sieger #157B, C.v. €700, Est. $250-$300, Scott #C7, C9