This is World's Finest Comics 1, published by Mimosa (SA Magazine Co) +/- 1963-1964.
It reprints the cover and all three stories from DC Comics' World's Finest Comics 131 (1963):
"The Mystery of the Crimson Avenger"
Aquaman: "The Man who controlled Water"
Green Arrow: "A Cure for Billy Jones"
Also reprinted is this story from DC Comics' Batman 113 (1958):
"Batman meets Fatman"
32 pages, glossy colour cover, black and white newsprint interior.
Here is the cover of issue 1 and DC Comics' original cover: