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Locomotion
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Locomotion
National Railway Museum
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Non-Commercial Use
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Category
Telecommunications
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Object type
telephone amplifier
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Maker
British Telecom
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'Speakeasy' telephone amplifier, c. 1965
1965
British Telecom telephone amplifier or loudspeaker unit, model STM, 1981
1981
British Telecom telephone amplifier or loudspeaker unit, model SL/B, 1978
1978
