Someone sent me this link some weeks ago.

http://www.grist.org/i/assets/2/humble-oil.jpg

The website where this was posted states:

"From a sharp-eyed reader comes this ad for Humble Oil (which later merged with Standard to become, yes, Exxon). It may win the All Time Millenial Award for Maximal Irony. It’s from a 1962 edition of Life Magazine, available on Google Books"