Hi all,
thanks for looking at this Flagon. A couple of answers.
There are no numbers on the stopper or neck.
Why Stourbridge ? why Pinwheel? Well, digging through a few of my books, it seems a low Flagon
Decanter like this is fairly uncommon. I found a few S & W and Webb Flagon decanters, c1880s,
and i think it was one in particular, in British Glass 1800-1914, Charles Hajdamach, plate 335 page 368
A decanter and stopper cut with pinwheel motif. Stevens & Williams, c 1895
Its very similar, ok, i know its not the same!
Frank , thanks for looking, i will join glass study.com

Its superbly finished, a polished base, every facet is polished, wonderful stopper, a long air bubble the length of the handle ,the cut spout, its just one of the nicest decanters ive handled, and generally, it was one of those old dirty items, that cleaned up so well, it nearly bought a tear to my eye

If anyone has the above book, (Bernard, im sure you have!) have a look.
Where ever its from, i love it

Andy