When around 1850 in England a new type of hyacinth vase was invented it looked more or less like this one. The bulging ring in the cup was made on purpose, it served to add a support later for when the flower would grow too tall to stand on it's own.
It worked so well that for decades afterwards this type of hyacinth vase was in production everywhere, not just in England. Bohemia made them, but also America and Holland.
I don't know where you live or where you bought it. By looking at the colour and the cup I would guess it to be English from around 1920. But then again, they had a good thing and everybody had a go at it for years.
If you can, do your research in old bulb catalogues. Bulb vases were regularly offered there together with the bulbs. As these catalogues always offered the latest novelties and had pictures of what was new, it should give you an indication of it's age.
Good luck,
Patricia