Gourd Shaped Dragon and Phoenix Porcelain Snuff Bottle

I am not entirely sure this is a phoenix on this bottle, but it is plumed and so I am guessing that it is.

It is blue underglazed porcelain. The reign mark on this has some similarity to the Hsien Feng mark, but the characters are unusual.

I will probably post this mark on the Gotheborg forum to see if I can find out more.