Contact goniometer hinged at the 90° graduation

G. Huck, Wien
Contact goniometer hinged at the 90° graduation (brass with silvered scale and steel, outside diameter 8.1 cm) in cream white chamois-leather, red, embossed leather-covered case (12.5 cm wide) with brass hook.
Signed "G. Huck in Wien", ca. 1820.

private collection