This is Archie's Girls Betty and Veronica 1, published by Mimosa (SA Magazine Co) in 1960.
It reprints the cover of Archie Comics' Archie's Girls Betty and Veronica 51 (1960):
24 pages, full-colour, newsprint stock cover and interior pages.
These titles were printed in a smaller size (255x175mm) compared to the original Archie Comics title.
The printing reproduction from the original was very good quality.
Here is the cover of issue 1 and Archie Comics' original cover: