This is Giant Batman 15, published by Mimosa (SA Magazine Co) +/- 1963-1964.
It reprints the cover and all three stories from DC Comics' Batman 147 (1962):
"The Plants of Plunder"
"The Secret of Mystery Island"
"Batman becomes Bat-Baby"
Also reprinted is this story from DC Comics' Detective Comics 233 (1956):
Also reprinted is this story from DC Comics' Batman 106 (1957):
"Batman's Secret Helper"
48pages, glossy colour cover, black and white newsprint interior.
Here is the cover of issue 15 and DC Comics' original cover: