俏探女嬌娃

 

The Deadly Angels ( 俏探女嬌娃 / Qiao tan nu jiao wa ) is a Marial Arts movie from Hong Kong published in 1977. 

I found a denim vest appearance there by Swiss actress Evelyn Kraft. She wears a white denim outfit with bell bottom jeans and denim vest here. White denim clothes were also part of the fashion in the 1970s, but a smaller and hardly overshadowed by the presence of indigo denim clothes.

Possibly there is a second denim vest performance, but I think, it is only a vest inspired sleeveless blue  womens top, not a blue jean vest, worn by Hong Kong actress Susan Yam-Yam Shaw in the sequence with the knife thrower. 

Here are two shots from another better resoluted source to compare. Still don't believe, its a denim waistcoat.

Chelsea Chan and more

 

Singer Chelsea Chan ( 陳秋霞 ) from Hongkong appearing a couple of times with denim waistcoat in the second half of the 1970s. Found in the WWW

And more women from Hongkong wearing denim waistcoats in the 1970s:

怀旧电影微风细雨点点晴精彩片段

 

A Chinese movie or tv-movie from the 1970s, with a young woman with denim waistcoat starring. Not sure, but I think, it was a Hong Kong movie. Translation of the chinese text maybe Breeze, Drizzle and Sunny or Breeze, Drizzle and Clear. I wasn't able to find out more, the exact year of publication or the name of the actress.