Unidentified dirk or hanger?

[werecow]

I'm wondering to what extent this model was regulated. Unfortunately the other two examples I've come across are both still on sale so I can't share the pictures, but while the similarities in the hilt are unmistakable (exact same pommel and guard and same proportions), they show some variation in both the blade and grip. One has a curved fullered saber blade, the other has a straight blade but no fuller, and both have an ebony grip with small ribs instead of the smooth horn that mine has.