Apparently either Yugoslavia was ahead of the rest of the world by about 25 years in fashion terms in WW2 or WW2 carried on in Yugoslavia until at least 1967. As a piece of science fiction, where WW2 didn't end in 1945, it might have worked as a plot twist to cover up the low budget, though even with that plot twist I'm pushing the boundaries of "what -if?".
In addition to the 60s clothes and styles, even the cinematography is firmly rooted in 60s TV series so even that can't hies all of the other faults. It isn't even bad enough to be good enough to watch ironically as a B-movie. It's just bad full-stop, a Z-movie at best, a waste of 5 minutes before you change channel, assuming you even last that long.
Does this review contain spoilers? It's hardly worth asking, the whole movie contains built-in spoilers simply by the fact that it exists, a mini-black hole in the world of cinema, sucking in viewers so they may never ever forget it once they've gone over the non-event horizon.