just a question - do any of those shown fit the height size given in the catalogue pages?
edited to add
and the Stevens and Williams 'rainbow' and one ribbed vase I've seen don't appear to be the same shape to me. I've not found one with a foot and also they are more barrel shaped and have a smaller aperture on the rim it seems - but admittedly very difficult looking at photos that may not be from the same angle.
Perhaps they both supplied. Perhaps some of those shown are Whitefriars and some are Stevens and Williams or a.n.other ?
m