Medical instrument - Wood - electrotherapy machine

Title:
Antique magneto-electric electrotherapy machine ca. 1870-1900
Description:
Beautiful old magneto-electric electrotherapy device from presumably the late 19th century.
The device sits in a wooden cabinet and is powered by a hand crank. Inside is the original mechanism with gears and magneto components. Also the two metal hand electrodes with wiring are present.
Such devices were formerly used for electrotherapy and muscle/nerve stimulation.
Features:
probably ca. 1870-1900
wooden cabinet
original hand crank
internal mechanism present
two metal electrodes included
beautiful original patina
interesting for collectors of antiques, medical instruments and old scientific equipment