Thanks for the prod, Anne.
Kastrup and Holmegaard were certainly capable
of producing these kinds of wares well into the 1970s, but whether they did or not is questionable.
None of it, at least, rings any bells from the K-HG catalogues I have, and pretty much all other glassworks had folded or been absorbed by this point. Plus I think most items of this style had been dropped by Danish manufacturers in the 1940s/50s.
Never say never, but it's very unlikely.