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LicenseAyrton & Perry's secohmeter, no
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© The Board of Trustees of the Science Museum
Ayrton & Perry's secohmeter, no. 14105, by Nalder Bothers and Co. Westminster
Details
- Category:
- Telecommunications
- Object Number:
- 1989-996
- type:
- ayrton & perry's
- credit:
- Muirhead Vactric Components Limited
