File:Portrait of Seymour H. Knox.jpg

Summary
As other Campbell's Soup Can articles state:

The image linked here is claimed to be used under fair use as:

1. It is a historically significant work. 2. The image is only being used for informational purposes. 3.Its inclusion in the article adds significantly to the article because it shows the subject of this article and how the image depicted is familiar to the general public. 4.The image is readily available on the internet.