So we are back to the original question :thup:
Hi All, Just to say on the original topic, the double magnum is a Caithness, Wuff flagged this up to me to have a look at. He also asked Alastair McIntosh as well. I remember we had to put the felt base on to protect whatever people put the big weight on, Alastair confirmed that we had to put the base on as we could not smooth polish a weight that big at that time. No signature would be under the felt but engraved usually round the edge.
Allan
I had a further discussion with Alastair about which of the double magnums it would be. To repeat - if you check the images on Scotlandsglass it will definitely not be Emerald (1985 = C). Azure (1989 = G) will be closer, although the colour would not be quite correct, and it takes a lot of imagination to read a G instead of a C.
Now - to date no images of the double magnums 1986/87/88 are online on Scotlandsglass (still waiting in the queue). Therefore I attach an image of Violet (1986) here: Alastair agreed that this would be the most likely candidate. There could have been fair variation in the amount of bubbling along the trails, and it would have been produced towards the end of 1985 (hence the C) to be issued in 1986; there have been other examples with the "production year letter" indicating the year prior to official issue of a weight.