Really only for DC comic book fans, the Journey of The Comedian’s Smiley Face Pin Badge.

https://www.cbr.com/dc-universe-comedian-button-path/

You will notice thar the article discusses the Smiley Face Button, when the author Dave Gibbons calls it a Smiley Face Badge (I am guessing that Dave gibbons in not a native North American" I could be wrong)

This is an associated article from the same website where the author discusses the smiley face pin badge;

https://www.cbr.com/watchmen-button-dave-gibbons/

In an interview with the author Dave Gibbons, he says;

"So on the sketch that I did, I drew a tiny little yellow smiley faced badge"

For international readers of this blog, in most places in the world the item in question is known as a "Pin Back Badge", but in the USA, they are a "Pin Back Button" and because it was invented in the USA, (see my other blog article linking the original patent application) I suppose we should call them buttons.... or perhaps not... :-)