Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Greece - Zeppelin Flight - 1933 (May 29 – June 6), Italy Return Flight registered cover from Athens to Brazil, franked by six stamps (one - on reverse), including Zeppelin set of three, tied by ''27.V.33'' air post date stamp, blue flight cachet, Rome ''29.V.33'' machine marking on reverse, with high probability was delivered by connected 3rd SAF with Pernambuco ''6.VI.33'' receiver, VF and very rare, Sieger #210y var, C.v. €1,000 for complete set on cover delivered by Italy Flight to Friedrichshafen, Est. $600-$700, Scott #C5-7