I wonder if anyone has any ideas about this. I have had it up on the Whitefriars help site, but it doesn't seem to be Whitefriars. It looks like an inkwell with a 1 in deep by 1 in diameter well inside. It has small, evenly spaced, controlled bubbles and part-polished pontil. It is approx. 3 ins in diameter and 2.25 ins tall. The base has a sunburst of elongated bubbles around the pontil. It is quite a heavy piece of glassware. Many thanks for any help with this.