I know - fantastic, isn't it? I originally bought it to sell on, but when it arrived the quality was so much better than I had expected (being used to a lot of really pretty but generally mid-quality Italian lamps)... so it's kind of slipped into my ever-increasing collection of glass lighting now. Oops.
Although on the issue of quality, the one aspect which might point away from Holmegaard is that the top rim is quite coarsely ground. My experience of their lighting is that this would have been polished... but then Michael Bang's 'Astronaut' lamp did have an unpolished base rim (the top rim was fire polished).