Delapena HHM/1A Honing Machine. Instruction and Adjustment Manual. Includes a copy of the booklet: "Delapena Recommended Honing Speeds & Honing Stone Pressures"

Hahn and Klob Hydraulic Lapping Machine LHD 1A. Instruction Manual with Detailed Sectional Mechanical Blue Print and Electrical Schematics. German text but clear illustrations.

Matrix (Coventry Gauge and Tool Company) No. 1A Cylindrical Grinding machine: Operator's Instruction and Lubrication Manual with electrical schematic.

Matrix (Coventry Gauge and Tool Company) No. 1A Cylindrical Grinding machine: Parts Manual as Sectional Drawings. Includes a detailed Sales and Specification Catalogue with annotated diagrams, electrical circuits, a foundation plan, lubrication diagram and clear descriptions of the machine's construction functions.