Founded in 1864, the J. Walter Thompson Company (JWT) is one of the oldest and largest enduring advertising agencies in the United States. The JWT 35mm Microfilm Proofs collection spans the years 1906-1960 and consists primarily of images of print advertisements and proofs taken from proof books and portfolios of domestic and foreign JWT offices. Clients include Ballantine's, B.F. Goodrich, Butterick, Corning, Crowell Publishing, Davey Tree Surgeons, General Cigar, General Motors, Guinness, Horlicks, J.B. Williams, Jergens, Johns-Manville, Nash, Northam Warren, Pennsylvania RR, RCA, Sharp & Dohme, Shell, Standard Brands, Sun Maid, Swift, Sylvania, United Airlines, Ward Baking, and Welch's Grape Juice. Acquired as part of the John W. Hartman Center for Sales, Advertising & Marketing History.

The JWT 35mm Microfilm Proofs collection spans the years 1906-1960 and consists primarily of images of print advertisements and proofs taken from proof books and portfolios of domestic and foreign JWT offices. Clients include Ballantine's, B.F. Goodrich, Butterick, Corning, Crowell Publishing, Davey Tree Surgeons, General Cigar, General Motors, Guinness, Horlicks, J.B. Williams, Jergens, Johns-Manville, Nash, Northam Warren, Pennsylvania RR, RCA, Sharp & Dohme, Shell, Standard Brands, Sun Maid, Swift, Sylvania, United Airlines, Ward Baking, and Welch's Grape Juice.