Director switching device, 1927
Director switching device, made by the Automatic Telephone Manufacturing Company, Edge Hill, Liverpool, 1927. From the first London director exchange at Holborn.
- Measurements:
-
overall: 585 mm x 435 mm x 215 mm, 27.5 kg
- Materials:
- metal (unknown) , paint and textile
- Object Number:
- 1971-352/1
- type:
- electric switch