Clinometer Compass
Clinometer handle compass is a reproduction of an antique clinometer compass.
The second and most interesting purpose is when tilting the compass on its side and viewing an object through the sights. This manipulative is to measure angle of elevation or depression of any object. 
A weighted pendulous arm beneath the compass needle can be read from one of three scales like angle in degrees beneath the zenith. This model can be used to find height and distance of a building etc. Provided in durable box.