Hindu actress Tina Munim wears a denim waistcoat in the 1978 Hindu movie DES PARDES.
Dedicated to all the beautiful women around the world wearing denim jeans vests while the 1970s this may also be some kind of online museum for the jean vests and denim waistcoats, that were an important part of the fashion in the 70s.
Hindu actress Zarina Wahab appeared two times wearing a denim waistcoat in 1978, once in a magazine and once in the Indian movie Anpadh.
I think, the denim vest in the movie is not the same she wears in the magazine. The magazine vest looks like a popular one by Levi's: