A nice and original WWII German heer (army) visor eagle here. A particularly early example of the heer visor eagle. Unfortunately missing all prongs from the reverse. Appears to be silvered tombak construction, which is another interesting feature about this early insignia. Unmarked to the reverse. 

 
The German Army (German: Heer) was the land forces component of the Wehrmacht, the regular German Armed Forces, from 1935 until it ceased to exist in 1945 and then was formally dissolved in August 1946.