This is Rip Hunter ... Time Master 1, published by Mimosa (SA Magazine Co) +/- 1963-1964.
It reprints the cover and story from DC Comics' Rip Hunter ... Time Master 14 (1963):
"The Captive Time-Travellers"
Also reprinted is this story from DC Comics' Action Comics 211 (1955):
Tommy Tomorrow: The Secret of Bandit 'X'"
32 pages, glossy colour cover, black and white newsprint interior.
Here is the cover of issue 1 and DC Comics' original cover: