THIEL Duplex 158 and 158S (the 158S has a separate feed motor and rapid traverses) Precision Milling Machines. A complete instructional data pack consisting of three Manuals bound as one: 1st Edition for the 158, a second edition for the 158 and another for the 158S. Operator's Instructions, Servicing and Maintenance with an electrical diagram. Includes use of the Accessory range - rotary tables, slotting head, etc., a copy of the Final-assembly Test Sheets used by the manufacture and a copy of the maker's well-illustrated and detailed Sales and Technical Specification Catalogue.