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Title: Siemens finger dial switch for automatic telephone, 1912 [Go to resource]
Description: Siemens finger dial switch for automatic telephone, 1912 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1912 Source: Science Museum Identifier: 1970-49 Go to resource More Like this...-
Selector switch, from automatic interdepartmental…Selector switch, from automatic interdepartmental…
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