Heald 72A3 and 72A5 Operator's Instruction and Maintenance Manual with Parts as Sectional Drawings. Heald Type 72A3 and 72A5 Size-Matic Internal Grinding Machines. Operator's Instruction and Maintenance Manual with Parts as Sectional Drawings. Includes a copy of the maker's detailed Sales & Technical Specification Catalogue. Manufacturers: Heald Models: 72A3 72A5 Contents: Operators Manual Maintenance Manual Parts Manual Catalog