The dagger is a WWII NSKK Dagger. It is identified by the brown handle and black scabbard.
The National Socialist Motor Corps (German: Nationalsozialistisches Kraftfahrkorps, NSKK), also known as the National Socialist Drivers Corps, was a paramilitary organization of the Nazi Party that existed from 1931 to 1945. Basically they were the chauffeurs of the Nazi party. I bought one last year for $40, had it authenticated, and sold it for over $450. This one looks exactly the same as the one I bought. Great purchase!!
The exact identity is made by what is on the other side of the blade near the bottom. Take a pic of that and post it.