This is a model KS98 bayonet made for the ReichsFinanzVerwaltung (RFV) Customs and Zollschutz service made by Eickhorn. This is an item of issue service bayonet and not the generally seen nickel plated private purchase KS98.
This bayonet is slightly larger overall than the private purchase bayonets of this style and is made of un-plated steel that is finished "bright". This bright finish is accomplished by polishing at the factory. The black checkered grips are made of hard rubber instead of the plastic seen on private purchase "Extrawaffen" or "Extra-Seitengewehre". This bayonet will actually affix to a rifle and has a "T" shaped slot instead of a "T/O" slot in the pommel. This means the bayonet was made to fix onto a Kar.98a police style carbine and will not fit onto a standard military Kar.98k unless the cleaning/stacking rod is removed. The steel scabbard is blued but these may also be found that have been painted black over the original bluing to refresh it. The bayonet is property marked to the "R.F.V." on the reverse guard. This bayonet was worn in a standard black frog and an aluminum/green Zollschutz knot was attached to the frog.