Harrison Trainer 250 CNC/Manual Lathe: Maintenance Manual and Parts Manual as useful Exploded Assembly Diagrams. This is for the CNC version of the M250 that looks very like the ordinary centre lathe - as distinct from the  fully enclosed version that is marked with just the wod "TRAINER"

Harrison Trainer 250 CNC/Manual Lathe: Programming Manual.

Harrison CNC M280 Trainer Lathe. This an "enclosed" model and usally marked with the single word "TRAINER" on the sloping surface to the right and the word "HARRISON" on the vertical surface immediately below (it should be be confused with the ordinary-lathe-like CNC Training version of the Harrison M250 lathe).

Harrison "Trainer" (marked simply "Trainer" on the headstock). Comprehensive Operator's Instruction, Maintenance and Programming Manual with Parts as Exploded Component Drawings and Electrical Schematic.

Harrison Trainer CNC Lathe marked simply "Trainer" on the headstock. Combined Operation, Parts, Maintenance and Programming Manual.