This is Supercomix Star Wars, published by Republican Press in 1977, who had started publishing Marvel Comics reprints in 1976.
This reprint has a few unique features:
R1,50 was a lot of pocket money in 1977!
Square bound 116 pages, it feels like a trade-paperback/graphic novel
It reprints the full film-adaptation story from Marvel Comics' Star Wars 1-6 (1977)
Cover of Supercomix Star Wars and Marvel Comic's original cover: