Resembles Slogan by Helmut Matheis. Notice the 'g' in particular. This isn't the same font, but I wonder if it could be his lettering.

- Mike Yanega

I agree, Slogan is your best bet.
The extra loop in the ‘g’ is not necessarily a signature style of Matheis, but a relic of German Kurrentschrift, see this lettering chart on Nina’s Flickr pages. So is the stemless ‘d’.

Florian... are there not "spineless d's" that were present in the Chaunceries of the early 16th century?

Of course! This form of ‘d’ is not unique to Kurrent; for example, it can also be found in the French Ronde and typefaces inspired by it, like Gando, Fling, or even Cochin Italic. For 1940’s Germany, Kurrentschrift is just a much more obvious source of influence.