Hi - regret I can't see this in my one and only book - Pina & Vigier - although that's far from conclusive I appreciate. Agree it looks Scandi, but there's been a lot of glass in recent years which has a similar appearance to the genuine stuff, and Holmegaard, generally, is signed together with year of production. Signatures are rarely that of the designer, and are usually created with something like a dremel or stylus point rather than acid.
Sorry this is unhelpful - fingers crossed someone might have the right answer for you. Nice piece by the way.