You cannot use the table if you cannot find the number. On International Harvester tractors, the location changed depending on the era:
If you are unable to find the serial number on the main identification plate, check these secondary locations: Identify Your Tractor (serial numbers) - TM Tractor Parts
Note: For a comprehensive list of thousands of models, enthusiasts often refer to official IH Archival Resources or the International Harvester Identification Guide .
Unlike modern cars with standard VIN locations, IH tractor plates moved around depending on the model and year. Here is where to look:
: Often found on the left side of the engine block or frame.
This format typically appears as a long string of characters (e.g., 2590009U004452 ):
| Model | Serial Number Range | Year Built (Approx.) | Notes | | :--- | :--- | :--- | :--- | | | 501 – 100,000 | 1939 – 1947 | Later replaced by Super A | | Farmall Super A | 250001 – 327826 | 1947 – 1954 | Includes high-crop variants | | Farmall B | 501 – 125,000 | 1939 – 1947 | Narrow-front row crop | | Farmall C | 501 – 75,000 | 1940 – 1948 | Offset design | | Farmall Super C | 160001 – 172772 | 1951 – 1954 | | | Farmall H | 501 – 390,000 | 1939 – 1947 | Most produced letter series | | Farmall Super H | 10001 – 24634 | 1953 – 1954 | Rare model | | Farmall M | 501 – 270,000 | 1939 – 1952 | | | Farmall Super M | 501 – 75000 | 1952 – 1954 | High compression engine |
