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Description: Plastic protractor with brass indicator pin, part of an optical instrument, made by Raphael Ltd., of England(?), 1880-1920 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: optical instruments Temporal: 1880-1920 Source: Science Museum Creator: Raphael Ltd. (maker) Identifier: A680868 Go to resource More Like this...
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