Map Measuring Meter Mini Opisometer Map Range Finder Distance Calculator Tools for Camping Hiking Cycling Hunting Outdoor Survival : Amazon.co.uk: Sports & Outdoors
Mini Outdoor Map Measuring Instrument, Distance Calculator, Surveying And Mapping Tool, Metal Wheel Used As A Gauge | Fruugo UK
Whats that thing called? Its a old map tool and you use it to measure distance? - Quora
Whats that thing called? Its a old map tool and you use it to measure distance? - Quora
My dad had this tool to measure roads on a map: set the needle on 0, roll the small wheel along the road you want to measure, look at the colored-scale that