After a little research, I think Falls Motors only manufactured the engines for automobiles. Here's a paragraph from an article on the Autoweek website:
"The Falls Machine Co. of Sheboygan Falls, Wisconsin, was established to build woodworking and milling equipment, but in 1908 started making industrial and agricultural engines. Before long it reorganized as Falls Motors Corp., building as many as 200 engines a day for automakers such as Dort, Elgin, Apperson, Moon and others that failed to survive the early days of the industry."