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Locomotion
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4
Non-Commercial Use
4
Category
Telecommunications
4
Maker
Bidwell, Shelford
1
General Post Office
1
Object type
telephone receiver
4
Place
United Kingdom
1
Material
metal (unknown)
1
Date
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General Post Office Telephone Earpiece
1915-1920
Telephone receiver with diaphragm
Telephone receiver of form provisionally patented by Shelford Bidwell in 1882
1877-1887
Pair telephone head receivers
before 1922