This just in from Wikipedia...
"
German police pistols can be identified by the hammer, which has small "ear" or "hook". According to section 7.7 of the German manual, the cutout is the Deformationssporn, which means “deformation spur”. This was a requirement of the West German Police for all their pistols, regardless of manufacturer, to alert police armorers if the pistol was dropped on its hammer."
I pretty much stand corrected, how 'bout that! Something new every day.
Gunny John