Vintage Map Measurer - Inch To Foot Opisometer, Germany, 2 Sided Measuring Tool

Vintage German Opisometer Map Measurer Drafting Tool Inch to Foot 2-Sided

Vintage DIETZGEN Opisometer, Swiss 1/8” Scale Map Plan Measuring Drafting Tool

Vintage Western German Opisometer Nautical Map Inch Counting Measuring Tool

Vintage German Double-sided Opisometer Map Measuring Tool w/ Compass

Vtg Hoffritz 2 Sided German Opisometer Map Measure Tool + OG Case + Instructions

Vintage 2-sided German Inch-to-Foot Map Measurer Opisometer

Vintage 2-Sided German Made Opisometer Map Measurer in Box - Nautical, Drafting