Lot 357
1931, 2nd Survey Flight by Wolfgang von Gronau with plane 'Grönland-Wale', cover from Berlin to List on Sylt, then via Reykjavik, Scoresbysund and Godhaab, Port Harrison, Hudson's Bay and Longlac, Ontario to its final destination Chicago, all postmarks and cachets on front, signed by the pilot Wolfgang von Gronau, fine and scarce with only about 20 items flown (AAMC-Nr. 1147; Muller-Nr. 455)
