map measuring wheels

Historical information

The map wheel is a simple, fast and accurate way to measure distances on maps, whether in straight lines or along curves.
Hold the device from the tip and trace with the small wheel at the bottom along the line to be measured
Measures distances in miles, kilometres or nautical miles depending on the scale on the side.

Physical description

Two metal map measuring wheel s

Inscriptions & markings

Map scales on each side of wheel

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