International Harvester Tractor Serial Number | Table- [work]

on major components (like the engine block) can provide an approximate production year. Decoding the Serial Number Format Late 1960s and newer IH tractors used a standardized Kind/Code system Kind (First 3 digits):

International Harvester serial numbers often include letter suffixes that provide technical details about the build: High-speed transmission Y: 12-speed transmission W: Wide front axle D: Diesel engine S: Low-profile or "Special" configuration 🛠️ Pro Tip: Checking Casting Dates International Harvester Tractor Serial Number Table-