This is All-Star Western 11, published by Mimosa (SA Magazine Co) in 1960.
It reprints the cover and two stories from from DC Comics' All-Star Western 112 (1960):
Johnny Thunder: "The Hand-Me-Down Badge!"
The Trigger Twins: "The Sheriff without a Gun"
Also reprinted is this story from DC Comics' All-Star Western 109 (1959):
Foley of the Fighting Fifth: "Trial by Magic"
24 pages, full-colour, newsprint stock cover and interior pages.
These titles were printed in a smaller size (163x115mm) 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 11 and DC Comics' original cover:
Mimosa All Star Western Series