The Ford 9N serial number is located on the left hand side of the engine block and has a prefix of 9N (example 9N10233).

1939 ………. 1 – 10233
1940 ………. 10234 – 45975
1941 ………. 45976 – 89887
1942 ………. 89888 – 105411
1943 ………. 105412 -109500

The Ford 2N serial number is located on the left hand side of the engine block and has a prefix of 9N (example 9N10233).

1942 ………. 9900. – 105374
1943 ………. 105375 - 126537
1944 ………. 126538 – 169981
1945 ………. 169982 – 198730
1946 ………. 198731 -258504
1947 ………. 258505 -306221

*Serial numbers for 9N and 2N tractors overlap for 1942 and 1943