In the mid 80s (around 85 - 86) Edinburgh Crystal wanted to expand their range to include paperweights. Rather than set up to do the manufacturing themselves they contracted out to Caithness. Over the two years Caithness made about 15 different designs of which some were limited editions (250 or 100) and some were unlimited. The weights were identifiable by having an E signature case and often the engraved signature. Usually for limited editions they would also engrave the design name but not always. This one is called Aquamarine. One of the paperweight books (Bob Halls Scottish paperweights I think) has a small section on them that includes a brochure sheet. I am not sure if there is a definite list of all the designs that were made.
If Allan S is watching, do you know if Caithness have a list?
Anyway Price about right.
After the arrangement with Caithness came to an end, Edinburgh started importing unspectacular Muranos and putting an Edinburgh sticker on them.
This is all off the top of my head. If I remember I will correct when I get home