Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Greece - Zeppelin Flight - 1933 (May 29-30), Italy Return Flight registered postcard from Athens to Germany, franked by six stamps (two - on reverse), including Zeppelin stamps of 30d in pair and 100d - single, tied by ''27.V.33'' air post ds, blue flight cachet, Rome ''29.V.33'' connection and Friedrichshafen ''30.5.33'' arrival marking, VF and scarce, Sieger #210x, C.v.€500, Est. $300-$350, Scott #C5-6