Unsure of what kind of pottery this is.  It is old and signed I believe, but cannot make it out. The last 2 pics are where I believe it is signed.   Matte finish on outside and glazed or opalescent on inside.  Rare design.....I've never quite seen anything like this.  It is void of any chips or hairlines or cracks.  It measures approx. 7" x 7" x 5"h.  Very pretty.  It will be packaged with lots of care.