Compass accuracy with articulated rods. The quickopening and stopping take place by means of the 2buttons on the rods, while the micrometric adjustment is accomplished by the central screw. The maximum size of the circle is about 320 mm, with extension approximately 580 mm. In brass with nickel plating opaque. Supplied in carton box with snap closure which contains: extension tube mines and universal coupling with screw terminal for pens and pens to China.
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