Identifying the year requires finding the physical identification plate. Common locations include: IH Tractors - identifying model from serial number
Many antique IH tractors lose value because the serial tag rots away. These tags were originally aluminum (post-1950) or tin (pre-1950). To preserve yours: International Harvester Tractor Serial Number Table-
Pro Tip: If the metal tag is missing, check the engine block. IH often stamped the engine serial number separately, which usually corresponds to the chassis number range. International Harvester Tractor Serial Number Table-
Happy plowing – and keep those serial numbers clean. International Harvester Tractor Serial Number Table-