This parts catalog covers International Harvester Farmall M, MV, MD, and MDV tractor models manufactured between 1939 and 1952. These tractors were renowned workhorses in American agriculture, celebrated for their durability and versatility. The M and MD models featured a standard two-wheel drive configuration, while the MV and MDV variants offered a tricycle front end for enhanced maneuverability in row-crop cultivation. Available with either gasoline (M, MV) or diesel (MD, MDV) engines, these tractors provided robust performance with engine displacements of 248 cubic inches and approximately 33-37 belt horsepower. Their design prioritized operator visibility and control, making them a staple on farms for over a decade. This comprehensive English-language parts catalog, identified as TC-28H, provides detailed component-level information essential for identifying and procuring replacement parts. It includes exploded drawings for visual part identification, official International Harvester part numbers, and specifications on part quantities per vehicle. The catalog clearly indicates model and year applications, detailing when specific part revisions were implemented. Coverage extends to engine components, transmission parts, chassis, steering, electrical systems, hydraulics, bodywork, and wheels. While not a diagnostic manual, this catalog is an invaluable resource for owners, mechanics, and technicians seeking to maintain and restore these classic International Harvester tractors.