I have very few but as everyone had so much fun trying to work out a possible Clichy, here is one you probably cannot guess but the process could be interesting.
Top view to one side.
(http://www.ysartglass.com/forum/ajctopside.jpg)
Base view, it is flat and highly polished.
(http://www.ysartglass.com/forum/ajcbase.jpg)
Clue: Made in England, no marks, 1980's.