Fine 17th Century Brass Sector Rule by MICHAEL BUTTERFIELD - EXCELSIOR 111548
$695.00
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13 1/8 inches long. Fine. Michael Butterfield, born 1635 an Englishman, worked in Paris ca. 1680-1724. Another source has Butterfield as a British clockmaker who settled in Paris about the year 1685 where he became engineer to the King. The British National Maritime Museum has him working in Paris ca. 1675-1715.
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