Years
Model
Prefix letters
Serial Number Series
Farmall Regular
1924
Regular
QC
501 - 700
1925
Regular
QC
701 - 1538
1926
Regular
QC
1539 - 5968*
1927
Regular
T
5969 - 15470
1928
Regular
T
15471 - 40369
1929
Regular
T
40370 - 75690
1930
Regular
T
75691 - 117783
1930
Regular (Modified Tractor)
IT
501 - 696
1931
Regular
T
117784 - 131871
1932
Regular
T
131872 - 134954