This is World's Finest Comics 2, published by Mimosa (SA Magazine Co) +/- 1963-1964.
It reprints the cover and all three stories from DC Comics' World's Finest Comics 132 (1963):
"Batman and Robin, Medieval Bandits"
Aquaman: "The Fish in the Iron Mask"
Green Arrow: "The Green Arrow Dummy"
Also reprinted is this story from Action Comics 219 (1956):
Tommt Tomorrow: "The Tom Thumb Tommy Tomorrow"
32 pages, glossy colour cover, black and white newsprint interior.
Here is the cover of issue 2 and DC Comics' original cover: