An 'Improved Patent Magneto-Electric Machine for Nervous Diseases,' with a brass and steel frame and ebonised handled grips, with a printed label to the interior of the mahogany case, with winding han
An 'Improved Patent Magneto-Electric Machine for Nervous Diseases,' with a brass and steel frame and ebonised handled grips, with a printed label to the interior of the mahogany case, with winding handle, 10.25in (26cm) w.