This is Jonah Hex 1, published by Americom in 1984.
It contains the story from DC Comics' Jonah Hex 38 (1980):
"Iron Dog's Gold!". The English edition features the original art and new typed lettering.
Americom only produced single issues of each reprint series (published in English, Afrikaans, Zulu & Sotho languages).
Americom English cover, and DC Comics' original cover: