No: 3201

This compass  is equipped with a mirror that could be pivoted over 180 degrees. The outside of the lid bears declination values for cities to the East and to the West, from the German border (Cheb / Eger) to the Ukrainian border (JASINA) passing through Prague (PRAHA) valid for the year 1938.
The ruler allowed the direct reading of distances on military maps to 1:75 000 - one division measures 1,33 mm equivalent to 100 metres on the ground.