تفاصيل

A-402

Half-circle, divided 0-180 both directions, radial arm with fine adjustment screw (of non-obvious use), bearing scale divided 30-0-30. Locking screw to set zero-position of radial arm. Glass window with crosshairs at center.

Calibrated Instrumetns/Inc./New York; 8" U. S.

early 20th century

metal, glass

United States

	Imperial(in)		Metric(cm)
Height			0.9
Width			20.2
Depth			15.6
Diameter
Circumference

	Imperial(in)		Metric(cm)
Height
Width
Depth
Diameter