White background with black text and an shades of red and blue. With and illustration of a thoughtful-looking man with glasses and a big red nose.
Rube Goldberg, the cartoonist resposible for these "I'm the Guy" buttons is more famously known for his illustrations of inventions that were funny and complicated. His name is in the Webster dictionary is defined as "accomplishing by complex means what seemingly could be done simply". He was a dedicated cartoonist, doing both political and comical cartoons. Goldberg is also a founding member of the National Cartoonist Society whose Reuben Award is named after his proper name, Rueben.
The popularity of the "I'm the guy..." slogans caught the eye of tobacco marketers. So if you wanted one of these buttons back in the 1910's, you'd have to buy some of their cigarettes.
There was even an "I'm the guy" song !