Large functional geocoin with diameter 63 mm.
Geocoin is delivered in box, together with holder.
Measuring sun declination
1) Hold the geocoin towards the sun
2) Let the sun shine through holes
3) Adjust the rotating part so the sun beam passes through both holes
4) Read the sun decliantion
Latitude reading in night
1) Hold the geocoin towards the Polaris (North Star)
2) Line up the holes sou you can see Polaris through both holes
3) Read your latitude
We will inform you of Stock product.