1930’s manufactured transparent plastic point finder for maps. Finder comes in original cardboard packaging.
For example these can be used to find the coordinates for a point on the map or locate a point on the map for known coordinates.
Included scales are 1:20 000 and 1:100 000.
- Hill steepness table for 1:20 000 scale.
- Angle arc for 0 to 360 degrees and for 0 to 6000 mils (Finnish / Russian Milliradians).
- Conversion table between degrees and Milliradians.