The weight is in the category which I call "interesting". I think it might be an early, non-production item from Perthshire Paperweights.
The central cane (which, as yet, I cannot find a match for) and the two other better quality ones have a Perthshire Paperweights look to them. And the general design of scattered canes on "lace" [a bit like the weight mentioned in the Ysart and Related Glass messages] was certainly a feature in their production ranges from 1971 onwards, although I believe these usually (always?) had the lace set over a coloured ground.
In the book Paperweights From Great Britain 1930-2000, John Simmonds illustrates a similar item to yours, but with a few more canes, including a "P 1969" cane, and which he describes as "very early undocumented spaced millefiori ...". 1969 was the start of regular production at Perthshire Paperweights.
The link in the story to "up the top somewhere" of Scotland could give the impression that the weights may have been made in that locality. But 20 years ago there were only two main makers "up the top" - Caithness Glass and Paul Ysart, both at Wick. I'll stick my neck out and say that your weight was not made by either of those.
Although it is probably not possible to find out now, it would be good to know what the other weights were like.