Though the true creator of the original Smiley face is somewhat disputed, it's impact on Pop culture can't be denied.
In the 1970's "Have a Happy Day" became a slogan, albeit an overused one!
Probably some of the most sought after Smiley's are those made by McCoy Pottery who manufactured Mugs, Banks, Cookie jars and planters. Their Smiley face design is considered by most to be the best example and the most evocative of the 1970's. Original Happy Face pinback buttons from the 1970's are also highly sought after and, due to their use, are hard to find in good condition.
Happy Face stuff continues to be produced today but the face just isn't the same.
Vintage is the only way to go! Have a Happy!