Max — When I looked at this first time around, it immediately struck me how very Joblingesque it was. Like the Lambton, fish, and bird & corn vases it has a ground top, slightly flared to make it a dual purpose vase / lamp base, a satin finish, and is of a similar size. And the colour is a good match.
So one possibility is that was Jobling, if you discount the faint marks you have observed. Now, I am sure that there were several patterns in this Jobling range that never went into production, like the tall centrepiece statuette of which a few examples survive. I believe that there may well have been some development of the range discontinued because of the war, and other scenarios are possible.
Another possibility is that as the Jobling fish and bird & corn vases were certainly modelled by Etienne Franckhauser, with the Lambton vase a possibility, I should have thought how very Franckhauseresque it was. This could help track down a continental maker.
If you bring it to Cambridge, we could compare it with the Jobling vases, as I am presently planning to bring the fish and bird & corn vases (if I can fit them in).
Whatever, it is a quite beautiful piece.
Bernard C.