This is All-Star Western 10, published by Mimosa (SA Magazine Co) in 1960.
It reprints the cover and all three stories from from DC Comics' All-Star Western 110 (1959):
Johnny Thunder: "The Gunpowder Dynasty!"
The Trigger Twins: "Banquet of Bullets"
Foley of the Fighting Fifth: "Wings over the Frontier"
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 10 and DC Comics' original cover:
Mimosa All-Star Western Series