2 Reichmark 1. South America flight, watermark Y (lying), horizontal pair - the left stamp with plate flaw I "moon over airship", as correctly franked franking on DOX card with cancellation "Dornier airship DOX 30. January 31", transit via Rio with stamp error 22. VI. 31, very fine, unsigned, photo expertize Dr. Helmut P. Oechsner BPP "in perfect quality. ", Michel 1.400.- plus plus