7 Gigantic Dinosaurs, Giant Dinosaurs, 114 East 32nd St., New York, 1958
full size = 1166x1600Whiting Papers, George A. Whiting Paper Company, 1955 (via File Me Away)
Anti-Littering PSA, Keep American Beautiful & The AD Council, 1970 (Via Found in Mom's Basement)
full size = 1536x2192and finally
Dopey Dan and Safety Sam, Wrigley's Juicy Fruit Gum, 1950s (via leifpeng at flickr)
full size = 1068x1518 