This is a nice original K98 Bayonet Frog (Seitengewehrtragetasche). The K98 bayonet was a standard issue item and was accompanied by a bayonet frog to be worn on the reverse left side of the load carrying waist belt. The K98 bayonet remained the standard issue bayonet through-out the war with minor manufacturing variations. The bayonet frog is made of high quality blackened leather. The frog is complete with with a horizontal retaining strap, after regulations of January 1939 this type was issued to all mounted and unmounted personnel. The blackened leather frog looks to be RB.Nr. marked. Nice original example in good used condition!