Physics teaching of electricity

Two antique physics teaching aids from the field of electricity, dating back to the 19th century, from an old Austrian collection. In the collection: a very old electrical isolator switch (knife switch) with a single-pole double-throw toggle switch, mounted on a wooden base. Dimensions: 9 x 18 x 6 cm cm; The second object is a historic spark inductor with a green coil, a demonstration of the inductive generation of high-voltage pulses, also mounted on a wooden base. A small metal plaque on the base reads: "I.O.ö. Lehr- und Lehrmittel-Anstalt Linz Lehrerhaus". Dimensions: 8 x 13 x 4 cm; Both teaching aids feature a beautiful natural patina and offer a great insight into the history of electricity; not tested for completeness or functionality; rust spots; sold in found condition; age-related signs of use;