MS&M began building Corliss steam engines, bridges, tanks, and other equipment. This was supplemented in 1905 by the Muenzel gas engines built under license from G Luther Company, Braunschweig, Germany. Joy-Willson Company of Minneapolis was selected in January 1910 to develop a four-cylinder tractor and build five sample machines. A redesigned tractor was built in 1911 and 1912. MS&M contracted with J. I. Case Company to build 500 of their 30-60 Case tractors for 1912. In addition, Reeves & Company ordered their tractor engines from MS&M. A $1 million dollar contract was signed in December 1913 with the Bull Tractor Company to build 4,600 Bull tractors. In 1914, MS&M made a deal with the Grain Growers Co-op in Canada for a lightweight tractor. It was similar to the Bull but was known as the T-C “Twentieth Century” tractor. MS&M agreed with Bull to refrain from selling this outfit in the United States for one year. Twin City heavyweight models were built until 1924. The trend to lightweight models prompted the introduction of the 16-30 and 12-20 tractors, followed by other improved models