It is a Paul Ysart weight.
And since the seller (Don) is here I will add a few comments on the "imperfections" (saves me contacting through eBay). But first, I will say, "Well done", on the descriptions of the condition.
It is possible that some of the described imperfections may be internal bubbles but these would usually be very small. Without handling the weight, it's not possible to say for sure what is and is not just a bubble.
The other imperfections all sound like regular damage caused by knocks and drops etc. None of this will be repairs filled with molten glass.
Some of the damage could be simple surface chips and for these the important issue is how deep they are as well as how large in area. The imperfections that "cannot be felt" are known as "bruises" and these are perhaps the most troublesome as it is not always easy to tell how deep they might be.
Bruises in glass paperweights often show little or no surface evidence that can be felt. But the cracks (usually concentric [part] circles) can sometimes go quite deep. This could affect a decision on whether polishing out would require excessive loss of material, thus altering the overall visual aspect of the weight.
As the weight is very small already (is it really just 2 5/16 inch?), full damage repair may not be feasible.
I will also give a comment on the question that has been added to the listing - a star cut base is not a regular feature of Paul Ysart weights, but it is not something that we can say will never be found. The "something" circling a central motif was most often millefiori but coloured twists (when set in a full circle they are called a "torsade") are known in several Ysart items.