Description
Full color 9 1/2″ x 13″ ad has a photo of a test going on. The picture shows two different toothbrushes attached to a wood frame rubbing together against the inside of a man’s forearm. The ad headline asks the question “What goes on here?” and the text explains the test. This ad is larger than my scanner bed so the outer edges of the ad will not be visible in the scanned view.
Source: February 10, 1947 Life magazine.
