2036

19TH CENTURY BRASS MATHEMATICAL SECTOR

19TH CENTURY BRASS MATHEMATICAL SECTOR
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19TH CENTURY BRASS MATHEMATICAL SECTOR
19TH CENTURY BRASS MATHEMATICAL SECTOR
19TH CENTURY BRASS MATHEMATICAL SECTOR

LOT DETAILS

Signed "Dring and Fage, London" circa 1850, a brass mathematical sector with ruler and scales for cosine, tangent, polygons, etc. - length 30.5cm (12in) when fully extended