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Electrically maintained tuning fork, by Muirhead
- Made:
- England
- maker:
- Muirhead and Company Limited
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Electrically maintained tuning fork, frequency standard used for synchronous working on picture standard facsimile machines
Details
- Category:
- Telecommunications
- Object Number:
- 1989-1028
- type:
- standards
- credit:
- Muirhead Vactric Components Limited