Thanks for popping in Nic, and for your thoughts on the practicalities which help considerably.
What I find a puzzle is why would a Danish glassworks choose to reproduce a design from the 1930s, when stylistically, it was so far out of synch with other 1960s production? We know what was around in the 1960s, and it was almost as far removed from Ilkley as can be imagined, even more so in Scandinavia than in the UK, so it's a real mystery.
Do we know if there were there any other pressed glassworks in Denmark in the 1960s?