Vintage Silva Map Measurer Curvimeter Distance Measuring Tool Made in Germany

Vintage French Curvimeter Map Measurer Double Sided Opisometer Made In France

Derby Swiss Curvimeter/ Meilograph/ Opisometer Drafting/Map Tool

Vintage Map Measurer Opisometer Curvimeter Made In England 1”=1 Mile 1cm=1km

Vintage Map Measurer/ Opisometer With Compass & sparking plug tester.

Vintage Map Measurer Opisometer – Nautical & Statute Miles, Kilometres

Vintage Map Measurer Imperial and Metric, nautical

Vintage Map Measure Opsiometer, Curvimeter, Made in Japan