Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Egypt - Zeppelin Flight - 1931 (April 11-13), Egypt Return Flight cover from Cairo, addressed to Paris, franked by complete set of Zeppelin surcharges, Friedrichshafen ''13.4.31'' drop marking and Paris receiver on the back, minor reversal flaws, F/VF, Sieger #105Az, Est. $150-$200, Scott #C3-4