This Compass was manufactured by the KADLEC - Instrumentenfabrik Prague, after the communist regime took over the industry's management. So it is Post WW2
A military model with double graduation (360 deg. clockwise, white figures and 6000 mils., counterclockwise, red figures) and cardinal points in Czech language: triangle for North, V, J, Z).
On the back you can read "sbs"
It contains radium paint ( 1.3 micro sievert/h)