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Non-Commercial Use
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Category
Telecommunications
4
Radio Communication
1
Object type
telephone relay
5
Maker
Brown, Sidney George
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Sidney George Brown
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Place of origin
London
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London, Greater London, England, United Kingdom
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Telephone exchange release alarm relay unit
Pair of telephone relays in wooden case
S G Brown telephone relay
Telephone exchange release alarm relay unit
Telephone exchange release alarm relay unit
