Here is a General Electric Superblow hair dryer commercial -16 – millimeter film from the late 1960s or early 1970s, from Richard Lyons’ collection of 16-millimeter films. This one includes a “China Girl” and other information on a few frames before and after the commercial. “China Girl” images were used by film lab technicians when processing the film.
https://www.atlasobscura.com/articles/the-forgotten-china-girls-hidden-at-the-beginning-of-old-films
https://en.wikipedia.org/wiki/China_girl_(filmmaking)
