Banner ad with testimonial + social proof
We see social used in the headline "Trusted by Moms", a bold pic of the product.
Then a 5 star testimonial with a "buy now" CTA
If you wanted to branch out of your own network to date in 1951, you would take out a personal ad much like this....
Figure out what's really going on by graphing it out.
This Dr. Pepper ad from 1979 showcases all sorts of different people enjoying a Dr. Pepper soda.