Functional vintage double-sided curvimeter. Germany. 1960. Vintage measuring instrument. Topography. Mapping

Double-sided curvimeter with ring, replacement case and original cardboard box.
Features a wheel to follow the route on the map and a serrated leveling wheel on the side.
Germany. Year 60.
Marked on the back of the box: “Kurvenmesser 8236 2 (see photos).
The curvimeter allows you to measure any non-rectilinear route on a map.
Length: 8 cm or 3 1/8 inches.
Diameter; 4.3 cm or 1 3/4 inches.
Weight: 36 gr.
Good general condition despite some missing chrome (see photos).

If you have any questions do not hesitate.