The McCormick-Deering 10-20 was built by International Harvester from 1923 to 1939 in the Chicago, Illinois, USA Tractor Works factory. The 10-20 looked much like the McCormick-Deering 15-30 but was considerably smaller. With its 2-plow rating it replaced the International 8-16. The engine was a 284ci ohv 4-cylinder governed at 1,000 rpm, coupled to a 3-speed transmission. In 1928 the 10-20 was given slightly more power by increasing the governed rpm to 1,025.