I have Jeoff. Timberlake's book which covers mainly Nazeing, but includes reproductions of some of the Kempton advertisements for their ornamental glass from the 1880s. One of these is a page which is a Supplement to the Pottery Gazette for June 1, 1886, and shows in b. & w., a selection of Kempton's Trumpet Vases which apparently ranged from 4.5 inches to 6 feet high, and in a large range of colours, including opalescent etc. etc. This might be the ad. to which Mike is referring, though possibly not of course. There are differences between the piece here and the Kempton vases insofar as most of the latter have trumpet shaped mouths, with a few showing an almost jip appearance, though none show the heavy crimping as on Roy's vase - however, the main difference is the mounded and ribbed feet of the Kempton vases. Whether Kempton's did any Trumpet Vases with coloured rims to the mouths I can't see from the b. & w. ad., though they were certainly granted BoT Registration Nos. for some lamp shades which were heavily crimped on the rims and many of which were formed in what we know as a 'pulled-up (combed) design in contrasting colour - i.e. the ' Nailsea' style.
It's an attractive vase Roy - you don't mention wear which IMHO something from the last quarter of the C19 would surely have - the piece reminds me of an epergne I once had - and most of those are very beautiful though impracticable.
I hate to be negative, but I'd have thought with very few exceptions it's a non-starter to expect an id on an item like this - such pieces of art glass were made in large quantities and in several countries and I'd have assumed the vast majority were unmarked. When you bought this piece Roy, was there any description offered?
Ref. "75 years of diverse Glass-making to the World" - A celebration of Nazeing Glass Works 1928 - 2003 and exploration of their Victorian origins. Geoffrey C Timberlake 2003.