Leinen LZ4S, MLZ4S, LZ4P (without a full screwcutting gearbox) and the SK (the ML21SB also looks similar) Super-precision lathe: Operating Manual with Sectional Drawings, Maintenance and Adjustment Sections, full Screwcutting and Power-feed rate Charts, works sectional drawings of the "Multiplicator" screwcutting gearbox, Wiring Diagram, etc.