Here is the often missing or damaged part of the 98k bayonet set. This one is in used but really good condition. No scratch or damaged. It is an early war type dark brown eagle stamped, it is hard to see but it might be a Kriegsmarine type ? 
A nice piece to complete your bayonet, still flexible and with a nice battlefield look ! 
This item was found in the city of Lorient, Bretagne, France, few years ago.