Nigel I have a vase in that green decor with a neat polished pontil mark ( I wouldnt' say it was completely round), and I also have two Nazeing Lattice pieces with what appears to be the same type of polished pontil mark, my green one is incredibly neat and round. The green used in both pieces appears to be incredibly similar, but difficult to tell because the lattice is green mixed with white. Happy to post pics once it's decided how the thread is going to be.
m