![](https://coimages.sciencemuseumgroup.org.uk/30/666/medium_thumbnail_1928_0945__0002_.jpg)
Campbell mutual standard by Cambridge Instrument Co.
- Made:
- 1925-1930
![Campbell mutual standard by Cambridge Instrument Co., No](https://coimages.sciencemuseumgroup.org.uk/341/894/medium_smg00175011.jpg)
Campbell mutual standard by Cambridge Instrument Co., No. L-16394
Details
- Category:
- Electricity and Magnetism
- Object Number:
- 1971-313
- type:
- mutual standard
- credit:
- South London Electrical Co.