There has been much discussion on the board regarding leech pots if my memory serves me well
Also discussion over white cased rough crackle vases at various times. In fact I might have posted the Schreiber und Neffen link elsewhere perhaps.
I was never sure if it ever was a leech pot. I thought it was really just a great shaped decorative item using a lovely technique to be honest. I don't have it anymore but I always wondered where it might have been made,so just adding this link above for future reference.