Caliper possibly for drafting Metal top of tool has two blades which come to point at tip. These can be adjusted with a screw attached to one side of the blade. Blades are attached to metal rod with vertical ridges. There are some letters engraved below the ridges "Germany" and "Schcfnner". Black plastic handle screws into metal top. It has a knob shape at the very end.

1997.055.047