The other ad is for Milwaukee Harvester Company, which was part of a major consolidation in the farm machinery business in 1902 that formed International Harvester and that was eventually challenged under the federal antitrust laws. The New York Times published a notice of the company's acquisition on August 13, 1902 saying that the buyer was unknown.
Agriculture is still big business in Minnesota, but its place at the heart of our culture is fading. I've watched how the Minnesota State Fair has changed over my lifetime. The machinery part of Machinery Hill keeps shrinking. Farm commodities reports are gone from the local news (although as I don't listen to WCCO anymore, maybe I just miss them). TV isn't dominated by agricultural ads. These signs are a reminder of how central farming used to be.