Silva Map Measuring Wheel

Convenient gadget for measuring distances on a map.

Useful for measuring orienteering courses or routes in the hills. Made by Silva

8 scales 1:15,000, 1:25,000, 1:50,000, 1:100,000, 1:75, 000, 1:200,000, 1:400,000, 1:500,000, 1:750,000