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Title: "Loose-leaf booklet containing text, photographs and drawing [Go to resource]
Description: "Loose-leaf booklet containing text, photographs and drawings of two calendar regulator clocks with gravity escapement made by Henry Hall Summers, c.1921-23" License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: clock - regulator
drawingTemporal: 1921-1923 Source: Science Museum Creator: Summers, Henry Hall (maker) Identifier: 1968-624 Go to resource More Like this...
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