How to Date International Harvester Sales Literature
The Letter codes appear on the back cover of a particular item, bottom left coner. The Letter codes correspond to the year printed. Here are some examples of literature codes and how to read them:
From a 1970s Pickup Truck Brochure: the number appears: AD-45556-B16 Looking at the chart below, "B" dates this as 1973
From a 1980s Tractor Brochure: the number appears: AD-35130-N Looking at the chart below, "N" dates this as 1984
From a 1930s Truck Brochure: the number appears: A-283-CC Looking at the chart below, "CC" dates this as 1939
From a 1940s Refrigerator Brochure: the number appears: A-3-LL Looking at the chart Below, the "LL" dates this as 1948
From a 1960s Farm Equipment Brocure: the number appears CR-1036-M1 Looking at the chart Below, the "M" dates this as 1962
Note: Sometimes but rare the brochure may have been printed the year prior to the actual model year, for example:
From a 1979 Scout Traveler Brochure: the number appears: AD-40589-G2 Looking at the chart below, "G" dates this as 1978, but remember it was printed in late 1978 for a 1979 model.
UNITED STATES
Letter Code and Year
A 1911
B 1912
C 1913
D 1914
E 1915
F 1916
G 1917
H 1918
I 1919
J 1920
K 1921
L 1922
M 1923
N 1924
O 1925
P 1926
Q 1927
R 1928
S 1929
T 1930
U 1931
V 1932
W 1933
X 1934
Y 1935
Z 1936
AA 1937
BB 1938
CC 1939
DD 1940
EE 1941
FF 1942
GG 1943
HH 1944
II 1945
JJ 1946
KK 1947
LL 1948
MM 1949
NN 1950
A 1951
B 1952
C 1953
D 1954
E 1955
F 1956
G 1957
H 1958
I 1959
K 1960
L 1961
M 1962
N 1963
P 1964
R 1965
S 1966
T 1967
U 1968
V 1969
W 1970
X-Z 1971
A 1972
B 1973
B/C 1974
C 1975
D 1976
E/F 1977
G 1978
H 1979
J 1980
K 1981
L 1982
M 1983
N 1984
CANADA
Letter Code and Year
A 1946
B 1947
C 1948
D 1949
E 1950
F 1951
G 1952
H 1953
I 1954
J 1955
K 1956
L 1957
M 1958
N 1959
O 1960
P 1961
Q 1962
R 1963
S 1964
T 1965
U 1966
V 1967
W 1968
X 1969
Y 1970
Z 1971
A 1972
B 1973
C 1974
D 1975
