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Title: Phonic motor clock type 1-B, patent no. 415758, serial no. 8 [Go to resource]
Description: Phonic motor clock type 1-B, patent no. 415758, serial no. 82137, by Muirhead and Co. Ltd., April 1937 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: phonic Temporal: 1937 Source: Science Museum Creator: Muirhead and Company Limited Identifier: 1989-1167 Go to resource More Like this...
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