Jean Palmerton

 

American actress Jean Palmerton performed 1977 in a supporting role with a blue jean vest in the American TV-show THE BOB NEWHART SHOW, episode You're Having My Hartley

Margot Mahler

 

German Bavarian actress Margot Mahler appeared in the 1975 German comedy movie ICH DENK' MICH TRITT EIN PFERD, wearing a blue jean vest. 

It seems that the movie was only published on video cassette, not on DVD. It was not possible to stream it anywhere to have a closer look. So the only sources at the moment are some rare scans.

Be careful, there is another movie with a similar German name ICH GLAUB' MICH TRITT EIN PFERD from 1978, an American movie with the original name ANIMAL HOUSE. 

Jewel Kilcher

 

In California American Singer Jewel Kilcher appeared live on stage in 2019, wearing a very vintage denim vest of a special kind, designed with a mixture of denim and leather. Found in the WWW

This is an unplugged session from the corona year 2020:

I remember to have seen Jewel with denim vest earlier too, in 2002 for example:

And earlier again in 2001 in New York City at the MTV Music Awards on September 6th (!), only 5 days before Nine Eleven.