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Title: Sinclair line selector automatic switch board (glass broken [Go to resource]
Description: Sinclair line selector automatic switch board (glass broken and incomplete) with step-by-step sending instrument (two appliances) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1915-251 Go to resource More Like this...-
Selector switch, from automatic interdepartmental…Selector switch, from automatic interdepartmental…
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