1. 1965.
Meet The Kelly Girls
The Kelly Girl temp office service (now the five billion dollar Kelly Services) was the place for bouffanted babes who were all business. They were so efficient, that "Kelly Girl" — much like what happened with Xerox — became the generic term for temp.
As you can see, their ads featured actual Kelly Girls, not models.
Their ads ran in Time magazine.
"Insist on the Girl with the Guarantee!"
2. 1964.
3. 1965.
4. 1963.
5. 1965. The Hair Apparent.