If the plate is missing, check the engine block (typically above the oil filler tube) for a stamped number that often matches or closely follows the tractor’s serial series. Decoding the Kind/Code System
: Some later models may have stamps near the transmission or on the left side of the frame. Decoding International Harvester Serial Numbers International Harvester Tractor Serial Number Table-
| Model | Serial Number Start | Year | |-------|--------------------|------| | Farmall 100 | 501 | 1954 | | Farmall 200 | 501 | 1954 | | Farmall 300 | 501 | 1954 | | Farmall 350 | 26001 | 1956 | | Farmall 400 | 501 | 1954 | | Farmall 450 | 25001 | 1956 | If the plate is missing, check the engine
If your Farmall M has a serial plate reading , you can look at the table above and determine it was built in 1941 . For larger models like the IH 300 or
For larger models like the IH 300 or the "H" and "M" series, look on the transmission or clutch housing. Seat Support:
Happy plowing – and keep those serial numbers clean.