Ferranti type V2015 ammeter
Siemens electro-dynamometer-ammeter
1882
Ferranti Ammeter
1920-1950
tong-test clip on ammeter
circa 1950
Model 401 Thermo-Ammeter
Holden's hot wire ammeter
1900-1903
Ferranti ammeter
Ayrton and Perry spring ammeter
1883-1894
Siemens Brothers
Steelyard ammeter, 1885
1885
Thermocouple ammeter
1937
The British Westinghouse Company ammeter
moving coil milliameter
circa 1942
Sangamo Weston Ltd ammeter
Direct Coil Recording Ammeter
1930-1950
electro-magnetic current meter
1910
Hot-wire ammeter
1931
Duddell's Patent thermo-ammeter
Ferranti ammeter
Ammeter by Schuckert
Ferranti Ammeter
1940-1960
Microammeter with combined lamp and scale
1960
Voltmeter and ammeter indicating the direct pull of a solenoid and tubular core
Moving coil milliammeter
RF Ammeter: spare for 2LO transmitter (9)
Ferranti ammeter.
Watson Multi-range milliammete
Ammeter, 5A, in mahogany case
1900-1959
Ferranti ammeter
Ferranti type AA25 ammeter
circa 1974
DC ammeter, as used at RAE.
Weston thermoammeter
RF Ammeter: spare for 2LO transmitter (7)
Moving Coil Ammeter
1884-1890
Polarised iron ammeter
Hot wire ammeter
Ammeter, moving iron
Ferranti Milliammeter
1930-1950
Crompton multi-range milli-ammeter
7-range clip-on ammeter
Hot wire ammeter
Ferranti Ammeter
1950-1960
moving coil ammeter
1910
Dynamometer ammeter
1914
Ayrton and Perry direct reading spring ammeter
Ferranti ammeter
Edelmann moving magnet milli-ammeter with pointer and key mounted in lid
circa 1897
Ammeter graduated to 100 amperes
1887
Moving magnet milliammeter
1900-1920