Hi Nic, thanks for the replies, I suppose it is possible I have never really looked at Caithness. I have enough problems with buying the foreign glass I see, if I bought English as well I would be homeless !! either by being broke OR not being able to get in the house because it is full of glass. LOL.... One thing is the inner rim has a slight bevel but there isn't one on the outer rim if that can give any clues. Sue