My (limited) research so far shows that there were very few national brands advertising at ballparks pre-1920. And since most of the large outfield signboards were hand-painted, minimal graphics were used. They focused on large letters and verbiage that could be seen from the infield stands (wealthier fans?) concerning products that could be bought locally/regionally.
I'll dig into Polo Grounds' specific advertising as I've come across excellent historical ballpark photos.
Last edited by the_mad_monk; 03-19-2019 at 11:30 PM.
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