The cycle repeated with new letter styles and formats for the late 1950s, 1960s, and 1970s models. Example Decoded
If your serial number tag is illegible or missing, you can use the found on the engine block, transmission, or rear end to find the approximate date. Casting codes typically follow a format like: A234 International Harvester Tractor Serial Number Table-
Always distinguish between engine numbers and chassis (tractor) numbers. Early models often emphasized the engine number. The cycle repeated with new letter styles and
Look on the main transmission case housing or the engine block wall on the left side. International Harvester Tractor Serial Number Table-