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A RARE EARLY 18TH-CENTURY BRASS SECTOR,
SIGNED J.W. GOETZ. FECIT LUDWIGSBURG, THE TWO ARMS ENGRAVED ON ONE SIDE WITH SCALES FOR LIN. ARITHMETICA., L. GEOMETRICA. AND LIN. POLYGON., THE REVERSE WITH SCALES FOR LIN. CHORDARUM, LIN. SOLIDORUM. AND LIN. METALL -- 12¼IN. (31.1CM.) LONG OPENED
SEE COLOUR ILLUSTRATION
SIGNED J.W. GOETZ. FECIT LUDWIGSBURG, THE TWO ARMS ENGRAVED ON ONE SIDE WITH SCALES FOR LIN. ARITHMETICA., L. GEOMETRICA. AND LIN. POLYGON., THE REVERSE WITH SCALES FOR LIN. CHORDARUM, LIN. SOLIDORUM. AND LIN. METALL -- 12¼IN. (31.1CM.) LONG OPENED
SEE COLOUR ILLUSTRATION