Vintage Swiss 1/4 Scale Tacro Opisometer Map Measuring Blueprint Tool

VINTAGE DIETZGEN 1/4” Scale Map Plan Measuring Drafting Tool + Box RARE 1715-4

Alvin 1114 Swiss Rolling Opisometer Map Measuring Scale 1/8 Vintage with Case

VINTAGE DIETZGEN 1/4” Scale Blueprint Measuring Drafting Tool + Box RARE 1715-4

Vintage ASI Tacro Opisometer map measuring tool (Switzerland)

Vintage Dietzgen 1/4" Scale Map Measuring Drafting Tool

Vintage Keuffel & Esser Opisometer Swiss Map Measuring Tool Curvimeter

Vintage DIETZGEN Swiss 1/8” Scale Map Plan Measuring Drafting Tool With Box