Stamped on a plate on the left side of the clutch housing or the engine tool box.
The comprehensive guide below details how to locate serial number plates, decode complex prefix codes, and reference the production year tables for popular International Harvester (IH) and Farmall models. Locating Your IH Tractor Serial Number Plate
This is the most common reason people consult the table.
This is where the comes into play. This guide will walk you through everything you need to know about locating, reading, and interpreting your IH serial number. What is a Serial Number Table?
International Harvester Tractor Serial Number Table (Select Models) International Harvester Tractor Serial Number Table-
Look on the left side of the transmission housing, just ahead of the rear axle, or on the front frame rail. Understanding IH Serial Number Suffixes
Following the Letter Series, IH introduced the Numbered Series (like the 100, 200, 300, and 400). These updated tractors utilized independent power take-off (PTO) and faster hydraulics. Serial numbers for these models are generally stamped in the same location (the clutch housing) but follow different year-by-year ranges than their predecessors. The 06, 56, and 66 Series (1960s–1970s)
Below is a serial number table for the most common International Harvester tractor series. Use this to cross-reference your number.
: This is the unique production number for your specific machine. Where to Find the Number Stamped on a plate on the left side
: Plates are frequently attached to the left-hand side of the transmission housing, right underneath the driver’s seat.
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"Super" models (Super H, Super M) or diesel versions (MD, W6D) often have distinct, separate serial number sequences.
| Model | Serial Number Start | Serial Number End | Production Years | | :--- | :--- | :--- | :--- | | | 501 | 53,200 | 1954–1956 | | Farmall 130 | 501 | 22,500 | 1956–1958 | | Farmall 200 | 501 | 24,300 | 1954–1956 | | Farmall 230 | 501 | 12,800 | 1956–1958 | | Farmall 300 | 501 | 47,500 | 1954–1956 | | Farmall 350 | 501 | 18,500 | 1956–1958 | | Farmall 400 | 501 | 36,000 | 1954–1956 | | Farmall 450 | 501 | 16,600 | 1956–1958 | This is where the comes into play
Located on the seat support bracket or the left side of the clutch housing.
The serial number table tells you the starting number for each production year. If your tractor's serial number is lower than the starting number for the next year, it belongs to the previous year. Popular Farmall and International Series Tables
[Your Name/AI Assistant] Date: [Current Date] Purpose: Reference for collectors, restorers, and agricultural historians.