(Note: Production numbers often overlapped into the next calendar year. Serial breaks listed represent the first number of that production run.)
| Year | Serial Number Range | | :--- | :--- | | 1947 | 501–11347 | | 1948 | 11348–57830 | | 1950 | 99536–121453 | | 1955 | 186441–193657 | | 1960 | 214974–217381 | | 1965 | 225110–227208 | | 1970 | 234868–236826 | | 1975 | 245651–248617 | International Harvester Tractor Serial Number Table-
In 1952-1954, IH added “Super” to denote upgrades (disk brakes, stronger hydraulics). The serial number table for these models often overlaps the standard letter series. (Note: Production numbers often overlapped into the next