Wollaston goniometer with mirror attachment

unsigned
Wollaston type goniometer (brass) with mirror attachment, engraved scale and vernier read-out with twin adjusting wheels and handle. Lead-filled base. Diameter circle 19.8 cm.
Unsigned, end 19th century.
At the base a paper label is glued stating "K. k. Staatsgymnasium Freistadt, Physikalisches Kabinett, Inv.-Nr. 247" and another small label states "O 43".

private collection