I have been talking to the locals, with varying results...
One person is adamant that labels like these (the bottom line) have never been used.
2 persons said 1970-ies, until I mentioned the actual glasses. Both thought they were first made in 1990+, but were still confused by the labels. One suggestion: maybe "older" stickers were used on glass(es) for export.
Several more agree with the dating, 1990+, possibly a little later (like 1997, maybe...).
I have 2 suggestions for designer, namely Lena Linderholm and Thommy Bremberg (http://www.bremberg.se/
One thing is sure, though: the model is called Piggelin. They are still made, but without the box. Nobody can remember bigger versions, īsuch as wine glasses ot the like.