Although best known for his post war Volkswagen illustrations, Bernd Rueters (1901 - 1958) produced a wide variety of excellent work before WWII. His work for the Adler 2.5L. is so exceptional, I've decided to do a separate article on them.
The Adler 2.5 L. was produced from 1937-1940. The streamlined body was the work of Karl Jenschke (1899 - 1969). The four door sedans were built by Ambi-Budd, the cabrios by Karmann, and a few sport models by Buhne.