A LARGE BRASS QUADRANT
THIRD QUARTER 18TH CENTURY, BY JOHANN CHRISTOPH VOIGTLANDER
Signed on the arm, the arc divided [7°]-0-90° with vernier for accuracy to minute of arc, lacking optics, with attachments for use on the horizontal or vertical axis
17½ in. (44.5 cm.)
A LARGE BRASS QUADRANT
THIRD QUARTER 18TH CENTURY, BY JOHANN CHRISTOPH VOIGTLANDER
Signed on the arm, the arc divided [7°]-0-90° with vernier for accuracy to minute of arc, lacking optics, with attachments for use on the horizontal or vertical axis
17½ in. (44.5 cm.)
