I'll try to respond in "reverse order" ....
SG is probably typo.
I agree - must be a typo - and has been corrected.
Alan mentioned other colours including red, but the info on Scotlands Glass for Caithness weights shows only the Blue, Peach and Damson versions. Blue was 1980, Peach 1981 and Damson 1982.
The red version - just named "
Floral Fountain" - was the first one to be issued in 1979 - and is "displayed" on Scotland's Glass.
If those were the only versions, then perhaps the Damson version did not sell as well as the others and that was the reason for closing before they were half through the edition? Strange, though, because most (of the not too many) folk I have talked to about this design say they prefer the Damson version!
Damson is certainly a very attractive colour - but it was the last to be issued. Possibly the "market" of collectors liking the design was already "saturated" with the other colours

. Because, definitively, if the weight would have sold better it would not have been stopped.
It there a catalogue of Selkirk weights anywhere ...?
By the way, Wuff was working on getting pictures of all LE Selkirk weights on Scotlandsglass. He had already digitised the pictures of the catalogues he owns. However, I am not sure how far he got with this.
There used to be a few selected catalogues online - complete pages and not easy to navigate - but at least the URL I had noted is no longer valid.
Correct - I have digitized all Selkirk catalogues (the ones I don't own myself I got on loan for scanning from the Yelverton Paperweight Centre): not just the limited editions, but all their weights. Quite a few of the limited editions do not show up in the catalogues, however ... but with the help of collectors like SophieB (thank you!) I could close many gaps.
As Frank implied above, however, not much has been uploaded to Scotland's Glass recently, but I am looking forward to getting it going again. In the meantime I had posted images of several Selkirk weights on this board - whenever a specific design was discussed.