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 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 bayonet frog is made of high quality chocolate-brown coloured leather. The frog is maker marked by the company of 'Gustav Sudbrack' from Bielefeld and dated 1940.  Nice original example in very good condition!