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Title: Davidson's Patent Automatic Memorandum Clock (No [Go to resource]
Description: Davidson's Patent Automatic Memorandum Clock (No. 2208) Patented in 1891 and signed by the patentee on the instruction card License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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