Pink Opaline vase with enameled silhouette of Diana, Goddess of the Hunt

This is a really nice opaline glass piece with a black enameled silhouette of Diana, Goddess of the Hunt. I'm having trouble with attribution, but my strongest hunch is that this was done in Neuwelt by Harrach, or at least Bohemian. Alternately, perhaps it could be English, a'la Stevens & Williams or Steuben. If anyone has any ideas, I would love to hear them.

The glass is nice and thick, with a fire polished rim and a ground and polished pontil, and stands nearly 9" high and about 5" wide across the bottom.