I stumbled across the Amazon listing for this. I'd never heard of this old East German studio, but this collection of their SF movies from the 60s and 70s looks interesting in Eureka's trailer for their upcoming box set.
https://youtu.be/2asT2nkzJZQ?si=RMYS1ASTZFIGn1eD
The included movies are The Silent Star, Signals: A Space Adventure, Eolomea, and In the Dust of the Stars. Some of them have startlingly low IMDB ratings though (in the 4 or 5 range), so I do wonder if Eureka just managed to cut together a good trailer. Has anyone seen any of these movies before?