Neil,
It certainly looks like a bulb vase but height of the vase and width of the entrance are very important here. Heavy is good, it stops the vase from tumbling over when the flower grows top heavy. Hyacinth vases are rarely signed (oh, if only they were) as they were considered ordinary household glass.
First glance tells me France from the art deco period. You might google 'vase jacinthe' on ebay to see what I mean although you won't find this vase there. I have never seen one like yours and I think it is beautiful. Is it uranium glass, does it glow under UV?
Patricia