Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Eritrea - Zeppelin Flight - 1933 (July 1- 3), 3rd SAF cover to Spain, franked by four stamps, including pictorials of 1L and 2L, tied by Asmara ''31.5.33'' date stamps, Friedrichshafen ''1.7.33'' connection and blue confirmation markings, Rome and Munich transits on reverse, Barcelona ''3.JUL.33'' drop hs, F/VF and rare, Sieger #219, Est. $600-$700, Scott #120, 125‑26