Fighting Knife, Dagger, or Tourista Souvenir?

[trenchwarfare]

Here is another piece, I've had for a while. At a glance, the fittings, and scabbard look tourista. But the quality of the blade make me think otherwise. Looks to have been made from a Yataghan bayonet blade. But, not just cut-down. The point was forged, and then expertly polished. The remnants of an elaborate hanger are present. It also had a latch at one time. Whatizzit?