This is Atlas Publications Bonanza 2, a South African reprint from 1963, which reprints Dell Four Color Comics #1283 from 1962.
Bonanza was a famous US Western TV series, which aired from 1959 to 1973.
Dell and Gold key produced 42 issues (with photo covers) in the 1960s.
32 Pages, colour cover, black-and-white interior.
Cover of issue 2 and Dell Comics' original cover:
Mimosa Bonanza 1