Two plug-in hot wire and thermocouple units and one base with socket, made in the USA by Western Electric, and a moving coil milliammeter calibrated for use with the thermocouple units to measure high frequency alternating currents, made by the Weston Electrical Instrument Corp., circa 1925
Plug-in hot wire and thermocouple unit type 22C No.24596, made in USA by Western Electric, forming the sensing element for a thermoelectric milliammeter suitable for measuring high frequency alternating currents
Plug-in hot wire and thermocouple unit type 22C No.48265, made in USA by Western Electric, forming the sensing element for a thermoelectric milliammeter suitable for measuring high frequency alternating currents
1A thermocouple socket made in USA by Western Electric, part of a thermoelectric milliammeter suitable for measuring high frequency alternating currents
Moving coil milliammeter model 425 No.43455, made by the Weston Electrical Instrument Corp., Newark, N.J., USA, marked `use with external heating element' as the indicating element of a thermoelectric milliammeter suitable for measuring high frequency electric currents, scaled 0 - 50, non-linear
