File:A pack of chewing gum, Wrigley's, 1940s.JPG - Wikimedia Commons
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Wm. Wrigley Jr. Company, est. 1891 - Made-in-Chicago Museum
Sold Price: 1930s Wrigleys Countertop Store Display. - August 5, 0114 9:00 AM EDT | Countertop store, Vintage packaging, Vintage posters
Wrigley's sold to Warren Buffett and Mars | Food & drink industry | The Guardian
Wm. Wrigley Jr. Company, est. 1891 - Made-in-Chicago Museum