Whitefriars GLASS Tha Art of James Powell & Sons
edited by Lesley Jackson, page 132, plate 137, Vase iv) ...
There could be some cofusion as the general description for plate 137 states:
Cut vases and bowl designed by ... etc.
and the description for vase iv) states:
Vase, flint, produced in two sizes ... etc
Neither of these descriptions gives the "turn mould-blown" detail, which is almost lost in the general wording.
So, Max, you're not losing your marbles. I think some folk may have missed the "hiidden" text.