Raab-Katzenstein RK-9
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Flag of Germany with a 3:2 ratio, instead of 3:5. The 3:2 version was used by the German Confederation and the Weimar Republic. See Flags of the World for more information.
Flag of Germany with a 3:2 ratio, instead of 3:5. The 3:2 version was used by the German Confederation and the Weimar Republic. See Flags of the World for more information.
Raab-Katzenstein RK.9 photo from Aero Digest October 1929