As a kid in the eighties, I used to play with these plastic space soldiers, lovingly painted by my grandfather.
I just rediscovered them and immediately wondered if they're from an actual franchise, or just sprang from some manufacturer's imagination.
They're the same size as "regular" toy soldiers, about 6 cm. in height. They are made in one part out of grey plastic, which is coming through in parts where the paint has chipped.
I could not find any identification mark anywhere on the figurines. They're from the early to mid eighties, but may have been bought earlier.
I assume my grandfather used his imagination and whatever colours he happened to have on hand, so the colours may not match with any franchise.