Dutch SA Stormdolk M 1917, used by the Dutch stormtroops, used in WW 2 by German troops in Norway, after 45 used by the Norwegian troops until ca.1960. Also numbered 5104 and a C on the crossguard. Scabbard is marked 1468 B. I have no idea the significance of these numbers. Grip strap was removed during the period when this was used in Denmark, according to an advanced Danish collector.