Years
Model
Prefix letters
Serial Number Series
Farmall M
1939
Farmall M
FBK
501 - 7239
1940
Farmall M
FBK
7240 - 25370
1941
Farmall M
FBK
25371 - 50987
1942
Farmall M
FBK
50988 - 60010
1943
Farmall M
FBK
60011 - 67423
1944
Farmall M
FBK
67424 - 88084
1945
Farmall M
FBK
88085 - 105563
1946
Farmall M
FBK
105564 - 122822
1947
Farmall M
FBK
122823 - 151707
1948
Farmall M
FBK
151708 - 180513
1949
Farmall M
FBK
180514 - 213578
1950
Farmall M
FBK
213579 - 247517
1951
Farmall M
FBK
247518 - 290922
1952
Farmall M
FBK
290923 - 298218