Woa. Those posters are really good. Totally different aesthetic than the film, but I think they draw from the Eastern Block's long tradition of Sci Fi that was more artsy and less action, far as I understand it.
Ironically because of the political system back then - censors did only a cursory check whether the work meets the guidelines (no gore, nudity, positive depictions of "imperialist" America) and there obviously was no push to make the poster "sell" the movie - authors had a lot of artistic freedom, so they experimented.
