WWII German brown dagger blade-parts

For sale last dagger parts from my father collections.This time ofered for sale German brown dagger blade,marked-see pictures,crossguards and tang nut. This guards no marked inside or outside,no idea? this crossguards set is original? or not? Sorry! I'm NOT expert for this type items.I'm selling only! No idea what metals crossguards and nut? Non magnetic,tested. Thank you for interested!