Dufour (Gaston Dufour) 223 & 230 Milling Machine Manual Dufour (Gaston Dufour) 223 and 230 Milling Machine: Operator's Instruction and Maintenance with Parts as Exploded Component Drawings and an Electrical Diagram. Manufacturers: Dufour Models: 223 230 Contents: Operators Manual Maintenance Manual Parts Manual Electrical Diagrams