Like a red flag Christine!
And believe it or not, I have exactly the same glass in the reverse, clear on top and green at the bottom.
The silvermarks on mine are very clear: WHS, Birmingham, and h for 1907 (I was told).
It's not the only bulbvase with a silver rim I've got and in most of the collegue-collections they show up as well, nearly always green, very occasionally cranberry.
All of them were bought in England, one way or another.
Up till now we haven't found it in any catalogue, bulb or glass.
So, going by what else we have as English vases, for us for the time being it's English, realising it's not the first time we've been very wrong.
Consolation probably is that you do not have a hyacinth vase but a tulip vase (the cup could never hold a hyacinth bulb, too big a bulb for this cup). And tulip vases are rare, as it is not an easy flower to grow on glass it was never popular.
Well done Andy!
Patricia