Siemens electro-dynamometer-ammeter
1882
Ferranti Ammeter
1920-1950
Ferranti type V2015 ammeter
tong-test clip on ammeter
circa 1950
Holden's hot wire ammeter
1900-1903
Model 401 Thermo-Ammeter
Ferranti ammeter
The British Westinghouse Company ammeter
Ayrton and Perry spring ammeter
1883-1894
Direct Coil Recording Ammeter
1930-1950
Steelyard ammeter, 1885
1885
Siemens Brothers
Thermocouple ammeter
1937
moving coil milliameter
circa 1942
Sangamo Weston Ltd ammeter
Moving Coil Ammeter
1884-1890
Ammeter by Schuckert
Ferranti Ammeter
1940-1960
electro-magnetic current meter
1910
RF Ammeter: spare for 2LO transmitter (9)
Hot-wire ammeter
1931
Microammeter with combined lamp and scale
1960
Voltmeter and ammeter indicating the direct pull of a solenoid and tubular core
Ferranti ammeter
Duddell's Patent thermo-ammeter
Hot wire ammeter
Moving coil milliammeter
RF Ammeter: spare for 2LO transmitter (7)
Ferranti ammeter.
Weston thermoammeter
Watson Multi-range milliammete
Ferranti ammeter
Ferranti type AA25 ammeter
circa 1974
Ammeter, 5A, in mahogany case
1900-1959
DC ammeter, as used at RAE.
Polarised iron ammeter
Ammeter graduated to 100 amperes
1887
Crompton multi-range milli-ammeter
Ferranti Milliammeter
1930-1950
Dynamometer ammeter
1914
Model 280 triple-range Volt-Ammeter Instrument no. 78912
Ferranti Ammeter
1950-1960
Ammeter, moving iron
7-range clip-on ammeter
moving coil ammeter
1910
Hot wire ammeter
Ferranti ammeter
Ayrton and Perry direct reading spring ammeter
Edelmann moving magnet milli-ammeter with pointer and key mounted in lid
circa 1897