Surveying tool; middle section and 2 arms with scales of equal parts. Two sights where limbs connect to ends of middle section. Other ends of limbs would also each have a sight; one sight present but detached, the other missing. A ball-and-socket joint on a small tube fits into the bottom center of the middle section.
Matériel
"TRIGONOMETRVM Totum Latus 100/Facini suo Marte fecit 1710."
