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