Walter Tool & Cutter Grinders. A comprehensive, well-illustrated 76-page all-models catalogue showing details of the machines design and construction and giving the full technical specifications for the Type 20, 20AY, 20AZ, 30AY, 30AZ, 30CY, 30CZ, 30QC, 40CY, 40CZ, 40CQ, 50CY, 50CZ, 50CQ,  UWS20, UWS30, UWS30CQ, UWS40, UWS50, Copytronic-501, Helitronic NC and full deta