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Title: [Go to resource]
Description: "Fortiphone" battery hearing aid, cased, by Siemens and Halske, Berlin, 1900-1940 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: hearing aids Temporal: 1900-1940 Source: Science Museum Creator: Siemens and Halske (maker) Identifier: A602535 Go to resource More Like this...
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