Dorothy Shepard, Wrigley& #39;s Gum Billboard, 1939. Get a closer look in the Online Archive: http://oa.letterformarchive.org/item?workID=lfa_shepard_0087">https://oa.letterformarchive.org/item...
A photograph of the billboard as it appeared in Fortune magazine. http://oa.letterformarchive.org/item?workID=lfa_shepard_0088&LFAPics=Yes">https://oa.letterformarchive.org/item...
Old film footage of the sign shows the animated bubbles in action: ">https://youtu.be/ZpXnEvW0X...
Close-up footage of the Wrigley& #39;s sign at a later time stamp:  ">https://youtu.be/ZpXnEvW0X...
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