File:Interwar pic.png

Summary
Not my picture, copyright owned by the German Federal Archive, given to Wikipediacommons. Creative commons attribution-share alike 3.0 Germany license.

Attribution: Bundesarchiv, Bild 183-2004-0203-503 / CC-BY-SA 3.0

Link to license: https://creativecommons.org/licenses/by-sa/3.0/de/deed.en