Years	Model	Prefix letters	Serial Number Series
20 Industrial
1923	20 Industrial	KC	(23 Made Between) 501 - 7640
1924	20 Industrial	KC	(31 Made Between) 7641 - 18868
1925	20 Industrial	KC	19001 - 19099
1925	20 Industrial	KC	25000 - 25124
1925	20 Industrial	KC	32501 - 32604
1926	20 Industrial	IND	32605 - 32699 Gasoline (32697 Kerosene)
1926	20 Industrial	IND	45001 - 45075 Gasoline (45008, 45014, 45026 Kerosene)
1926	20 Industrial	IN	1053 - 2182 Gasoline (1165, 1166, 1476, 1477, 1478, 1951, 1952, 1953, 2038 Kerosene)
1927	20 Industrial (Modified Tractor)	IN	2183 - 4024
1928	20 Industrial (Modified Tractor)	IN	4025 - 7072
1929	20 Industrial (Modified Tractor)	IN	7073 - 11679
1930	20 Industrial (Modified Tractor)	IN	11680 - 15076
1931	20 Industrial (Modified Tractor)	IN	15077 - 16907
1932	20 Industrial (Modified Tractor)	IN	16908 - 17622
1933	20 Industrial (Modified Tractor)	IN	17623 - 17828
1934	20 Industrial (Modified Tractor)	IN	17829 - 18037
1935	20 Industrial (Modified Tractor)	IN	18038 - 18210
1936	20 Industrial (Modified Tractor)	IN	18211 - 18405
1937	20 Industrial (Modified Tractor)	IN	18406 - 18617
1938	20 Industrial (Modified Tractor)	IN	18618 - 18737
1939	20 Industrial (Modified Tractor)	IN	18738 - 18864
1940	20 Industrial (Modified Tractor)	IN	18865 - 18896