I'm a little uncertain about my Castle Rock being pre-production, I only bought it very recently - possibly this year, maybe the end of last?
On the other hand, they are just selling off all the old stock in Crieff .....
(You may well be interested in visiting Crieff when you're in Scotland, Wuff? They're open 7 days a week, but you can only see the glassmaking monday to friday.)
I must remember to take the camera with me next time I go, and ask if I can get any images of some of the more unusual bits. You're welcome to use my images for SG too.