Hans Grade
Hans Grade (May 17, 1879 – October 22, 1946) was a German aviation pioneer. Hans Grade was born in Köslin, Pomerania.
Hans Grade (May 17, 1879 – October 22, 1946) was a German aviation pioneer. Hans Grade was born in Köslin, Pomerania.
Hans Grade (May 17, 1879 – October 22, 1946) was a German aviation pioneer. Hans Grade was born in Köslin, Pomerania.
Source: Wikipedia "Hans Grade" · CC BY-SA 4.0
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