Based on the visual features, the device in the suitcase appears to be a Wohlmuth Feinstromgerät (also known as a Reizstromgerät). Produced by the German company Wohlmuth-Vertrieb, these devices were historical medical tools used for electrotherapy and galvanization, often dating from the early 1900s through the 1980s. Key Characteristics: Function: It was typically used for medical therapy using galvanic (direct) currents. Components: The device features a central analog meter with two large control knobs on either side. Below the meter are sets of red and green connection ports. Case: It is housed in a portable black suitcase lined with foam padding, characteristic of models from the later 20th century. Secondhand With Original Box Shipping DHL