Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - GB Offices in Morocco - Tanger - Zeppelin Flights - 1933 (May 6-9), 1st SAF registered cover from Tanger to Brazil, franked by 12 GB definitives overprinted ''Tanger'', cancelled by oval ''26.AP.33'' ds, red connection and dark blue flight markings, San Paulo ''10.V.33'' receiver is on reverse, minor flap imperfection, F/VF and scarce, Sieger #202, Est. 400-$450, Scott #501-04