More women with denim vests from the large country in South America. Source again magazine clips from 1976 to 1978 from Brazilian magazines. Found in the WWW, especially here:
https://revistaamiga-novelas.blogspot.com/
https://astrosemrevista.blogspot.com/
First we have Brazilian musician Edith Veiga clothed with a denim vest like piece here:
Next step is the German born Brazilian actress Elisabete Gasper aka ELIZABETH GÁSPER VEDETE:
We come to the more difficult cases now. Sometimes you want to see a denim vest there, where maybe is no denim vest. For example here. Lúcia Alves wears a white sleeveless piece, that may be a white denim vest. Maybe not.
Sometimes you want to see a denim vest there, where maybe is no denim vest. Another example here. Sonia Melo wears a top, that is only denim vest inspired, but not really a denim vest.
Sometimes you want to see a denim vest there, where maybe is no denim vest. Another example here. Susana Vieira wears a denim top, that may be a collared denim vest. But I couldn't verify it, it can also be a collared sleeveless denim dress.
Here are some more MAYBEs. Two 1970s Brazilian fotonovelas showing actresses with pieces looking like denim vests. Maybe they are, maybe not.
One more MAYBE. Not a hundred percent sure if Thaïs de Andrade wears a denim here:
At the end we return to the denim vest wearing young woman from the beginning, named Lidia Brondi, a Brazilian actress: