G.P.O. moving coil milliameter and voltmeter
Avodaptor for use with Avo meter to test radio equipment
potentiometer no.114 - 1890
potentiometer no.1012 - 1920
Crompton potentiometer
Siemens and Halske test set no.46371
portable voltmeter no.94282 - 1918, 0-600v.
Electrostatic voltmeter, disassembled to show parts
