Serial Number Table- | International Harvester Tractor

| | Production Years | Serial Number Range | | --- | --- | --- | | H | 1940-1953 | 101-120,000 | | M | 1940-1952 | 201-50,000 | | MD | 1945-1952 | 101-20,000 | | 300 | 1953-1957 | 301-10,000 | | 400 | 1953-1957 | 401-8,000 | | 500 | 1953-1957 | 501-6,000 | | 700 | 1955-1958 | 701-4,000 | | 800 | 1955-1958 | 801-3,500 |