Magneto induction key for an electric telegraph, made by Siemens and Halske, Germany, 1850-1870.
This magneto induction key was used in an electric telegraph, and was made by Siemens and Halske around 1860. The key did not require a battery as it incorporated a magneto generator actuated by pressure of the Morse key which provided the signalling current.
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- Donated by Siemens Brothers and Company Limited
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