Q. Historical advertisements?

• Ad*access (1911-1955) (courtesy of Duke University)
• AdViews: A Digital Archive of Vintage Television Commercials (1950s to 1980s) (courtesy of Duke University)
• Market Research and American Business, 1935-1965
• American Memory: Advertising collections
• Emergence of Advertising in America: 1850-1920 (courtesy of Duke University)
• Resource of Outdoor Advertising Descriptions (1920s to 1990s) (courtesy of Duke University)
• The Advertising Archives (mid 1800s to present) - focus on Europe and U.S.
• ProQuest Historical Newspapers
• Sunday Times (London) Digital Archive (1822-2016) 
• Times (London) Digital Archive (1785-2019) 
• Economist Historical Archive (1843-2020), Vogue Archive (1892+) and Women's Wear Daily Archive (1910+) contain the advertisements published in each issue.
• J. Walter Thompson: Advertising America.  Contains documents from the archives of J. Walter Thompson, one of the largest advertising firms in the United States.  They range from the 1890s to the late 1990s but most are from 1945 forward.  The collections included are the firm’s publications, account files for 9 key clients, staff newsletters, writings and speeches, research files, and a selection of print advertisements. A huge number of brands, companies, and industries are covered from automobiles to cosmetics and cruises.
• Trade Catalogues and the American Home. Collection of illustrated catalogs offering products for direct sale to consumer, from late 18th century to present day.   Useful for the study of popular culture, material culture, social norms and attitudes, as well as the history of marketing, business, and technology.  Includes capsule histories of important retail companies.
  

In Internet Archive, use keyword searches such as: old time radio advertisements, classic commercials, drive-in movie ads.

See Historical Advertisements & Propaganda (Business and Political) (Courtesy of University of Pennsylvania)