Galvanometer, magnetic needle type, wooden base, metal fittings in glass cover, by William Hart of Edinburgh, 1900-1920 Galvanometer, magnetic needle type 1900-1920
Voltmeter and ammeter indicating the direct pull of a solenoid and tubular core Voltmeter and ammeter indicating the direct pull of a solenoid and tubular core
Voltmeter and ammeter indicating the direct pull of a solenoid and tubular core Voltmeter and ammeter
Moving coil galvanometer, designed by D'Arsonval, modified from earlier models, wooden base supporting large magnet and moving coil, scale over magnet, pointer on coil, French, 1890-1910 Moving coil galvanometer 1890-1910
Set of 8 ammeters by Philip Harris Ltd. Six circular 0-3 amps, two quadrant 0-15 amps Set of 8 ammeters by Philip Harris Ltd. Six circular 0-3 amps 1950-1970
Four ammeters in white plastic and perspex. 'Made in USSR Educational' on front Four ammeters in white plastic and perspex 1970-1985