Sorry, didn't mean to insinuate that this was by Holmegaard. I was just pointing out in response to Ivo's post an example of Danish glass that I knew of which had the same neck.
Quite a lot of Holmegaard wasn't signed, though. (most) tableware (decanters, glasses, etc...) and all the pressed glass I've seen. Then there's the later stuff like the Gulvase, Carnaby, Palet, etc...