hi Chris...... When you think of the vast acres of patterns/designs in glass - much of which defies running down to a catalogue that we can find easily, then there are always going to be some that give problems regarding attribution.
Catalogues for factories which often had the most prolific of output are frequently not available, and T/Webb is just such a factory (or at least not available to most of us).
Patterns/designs were copied and not possible to be certain sometimes as to origin.
In addition to the McConnell/Miller reference mentioned above, I've just remembered that there is also an image in Dodsworth (catalogue No. 283 - page 47) which shows a footed blue vase with an almost identical spiraling to your piece, and which is attributed to T/Webb.
There seems no doubt as to the provenance of Roger Dodsworth's vase since the piece is backstamped Webb.
I suspect that the W/Fs piece you're referring to is one of the Woodchester beakers?? - so no connection there.
Date wise, for your vase, I'd suggest 1930's.
I don't participate in ebay, so really unsure of what your second sentence means, sorry