Portal:Anniversaries/March 15

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Revision as of 00:52, 27 April 2020 by meta>Stephen Foskett (Created page with ":'''1813''' — German watchmaker Georg Friedrich Roskopf, inventor of the Roskopf escapement, is born. <noinclude>Category:Anniversary...")
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1813 — German watchmaker Georg Friedrich Roskopf, inventor of the Roskopf escapement, is born.
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