Ayrton & Mather electrostatic gravity voltmeter by R.W. Paul
1893-1901
Pocket voltmeter, moving iron repulsion type
1910
Cardew's voltmeter, patent, no. 147 (Ediswan)
1890
Early moving coil voltmeter
1889
Moving-coil voltmeter
1943
Sensitive electrostatic voltmeter, 1893
1893-1918
Voltmeter graduated to 100 volts
1887
Valve millivoltmeter type 784
Self-recording voltmeter, by Richard Freres, 1892-1893
1892-1893
Polarised iron voltmeter
Hot-wire voltmeter
1895
Pattern K unipivot millivoltmeter
1912
Voltmeter, centre zero, scale 3-0-3V
Alioth's spring controlled voltmeter reading 0 to 250 volts
Universal voltmeter type 261 Serial No.116 made by Sapphire Research and Electronics Ltd
1955-1960
Avometer model 7 manufactured in 1956
1956
Crompton 6" voltmeter no.10707 - c.1899, 0 - 150v.
Hot-wire voltmeter
1893
Crompton 8" voltmeter no.26725 - c.1910
Kapp and Crompton alternating current voltmeter
Moving coil voltmeter
1894
Portable movable coil recording voltmeter no.157294
G.P.O. moving coil milliameter and voltmeter
Electrostatic voltmeter
Electrostatic voltmeter, no. 37
Marconi electronic voltmeter, type BD699A
Millivoltmeter of moving coil type with shunt
Ferranti voltmeter
Ferranti model NS voltmeter
Ferranti model NS voltmeter
Ferranti model NS kilovoltmeter
Ferranti type A46F voltmeter
Elliott sector voltmeter 0-120V, serial No.1107651
One Ayrton-Perry voltmeter
Kelvin recording Voltmeter no. 7
Lahmeyer electrostatic voltmeter no. 116298
8" dial
Cardew hot-wire type Voltmeter no.E68
Siemens torsion type Voltmeter
Soames and Nalders patent Voltmeter
Portable moving coil voltmeter
1902
Eight inch dial
Ferranti millivolt meter
Ferranti Ltd model L1609 volt meter
Ferranti voltmeter
Ferranti model VV2 voltmeter
Ferranti model RMCAB35 voltmeter
Ferranti voltmeter
Ferranti voltmeter
1954
Early Thermionic voltmeter (Cambridge Inst. Co.)
1925