Various Circus Posters Featuring Clowns

Nothing says "circus" more than a classic looking clown on a poster or billboard. Shows have been using clowns as a focal point of their advertising for decades.
Here are some posters from the 50s, 60s, and 70s from the private collection of fellow International Clown Hall of Fame board member, Ralph Pierce.

 I wonder how Ringling felt about their "Greatest Show on Earth for the Price" slogan.....