This is All-Star Western 15, published by Mimosa (SA Magazine Co) in 1960.
It reprints the cover and all three stories from from DC Comics' All-Star Western 115 (1960):
Johnny Thunder: "Guns of Destiny"
Foley of the Fighting Fifth: "The Raid of 'Chief' Fuzz-Face"
The Trigger Twins: "The Girl from Sioux Country"
Also reprinted is this story from from DC Comics' Tomahawk 21 (1953):
"The One-Man Posse"
32pages, glossy cover and newsprint black-and white interior pages.
These titles were printed in a smaller size (187x132mm) compared to the original DC Comics title.
This is one of the seven first titles that Mimosa started reprinting in 1959 (Western Comics, Tales of
the Unexpected, Falling in Love, Mystery in Space, Romances, Batman and
Here is the cover of issue 15 and DC Comics' original cover:
Mimosa All Star Western Series