Two restoration objects from the field of electricity

Antique physics teaching instruments: Two restoration objects from the field of electricity, dating from the 19th to 20th century. The collection includes: 1x vintage precision hygrometer by "G. Lufft Mess- und Regeltechnik," missing the thermometer for saturation pressure (dimensions: 8 x 24 cm), and 1x wooden ampere/tangent meter with missing parts (dimensions: 8 x 8 cm). Both objects are incomplete and are offered as such. These teaching aids feature a beautiful natural patina and provide a fascinating glimpse into the history of electricity. Condition untested, with rust spots, preserved in original found condition. Age-appropriate signs of use.