6004156 Alignment test for spindle of turret lathe (b/w photo) by English Photographer, (20th century); Private Collection; (add.info.: Alignment test for spindle of turret lathe. The dial indicator is held in a block and slid along to ascertain parallelism with the top and the guiding edge of the bed, Alfred Herbert, Ltd, Coventry. Illustration for Engineering Workshop Practice by Arthur W Judge (new and revised edn, Caxton, c 1936).); by Look and Learn; English, out of copyright.