This is Mystery in Space 9, published by Mimosa (SA Magazine Co) +/- 1960.
It reprints the cover of DC Comics' Mystery in Space 54 (1959), while the first story reprinted comes from DC Comics' Mystery in Space 49:
"Dummy that saved the Earth!"
The second story reprinted comes from DC Comics' Mystery in Space 50:
"Riddle of Asteroid 8794!"
24 pages, full-colour, newsprint stock cover and interior pages.
Here is the cover of issue 9 and DC Comics' original cover:
Mimosa Mystery in Space Series