Galvanometer, magnetic needle type, wooden base, metal fittings in glass cover, by William Hart of Edinburgh, 1900-1920 Galvanometer, magnetic needle type 1900-1920
Control panel, wood case, metal fittings, by William Hulme, Edinburgh, 1900-1910 Control panel 1900-1910
Dental unit head set, on wooden stand with glass cover, by the Ritter Dental Manufacturing Co., USA, 1925-1940 Dental unit head set on wooden stand with glass