A. Gaiffe Meylan-d'Arsonval moving coil milliammeter

Electricity Supply

c. 1890

A. Gaiffe Meylan-d'Arsonval moving coil milliammeter, c. 1890

'Cirscale' moving coil ammeter

Electricity Supply

Record Electrical Co. 'Cirscale' moving coil ammeter

moving coil ammeter

Electricity Supply

c. 1940

Record Electrical Co. 'Cirscale' moving coil ammeter, c. 1940