I will do when I next see him. I did ask a passing question about how he started doing it, and he I'm sure he said they needed certain things in the lab and couldn't buy them so he made them. I'll find out more.
One more thing - since Bernard has raised a question regarding the foot of a Stevens and Williams trumpet vase I thought I'd put an observation on here about the foot of the goblets, they are bevelled around the top edge. I thought that was rather neat. I've never seen that before, however I don't collect anything with feet normally, the only vase I have that has a foot has a rolled rim.