The knife is an SS dagger, complete with a sheet and a chain lanyard.
In Inglourious BasterdsEdit
Hans Landa carried one such dagger that he gave to Lt. Aldo Raine, telling him that he's officially surrendering to him. After Aldo shoots Hermann and gives it to Utivich telling him to scalp the dead soldier, which he does.
Behind the scenesEdit
The dagger is displayed on the YourProps website.