Telephone-exchange ringing machine type 17700
- Made:
- 1970
Telephone-exchange ringing machine type 17700, by Walter Jones and Co. (Engineers) Ltd., c. 1970, and associated power-supply unit by Harmer and Simmons (S/N 72510)
Details
- Category:
- Telecommunications
- Object Number:
- 1985-604
- type:
- ringing machine
- credit:
- Walter Jones and Co. (Engineers) Ltd.
