Thanks Ingela, can you clarify how the alternate names are organised/used? Could they be trademarks, but if so why precede the name on the label with AB (=Limited company).
BIFIRMAS VERKSAMHET / ÄNDAMÅL
(Gränna Glashytta, Granna Crystal)
Online translators can only cope with VERKSAMHET=Activity
Your labels can be roughly estimated by how they are made (Very roughly 1 & 3 pre 1980, 2 & 4 post 1980) but it would be nicer to get the dates of use tied down. I cannot find a website/email for the company but you could try writing to them with pics of the labels.
However this (
http://www.skgorvelte.nl/pages/galerie.htm)...
Gränna Glasbruk AB. Gränna Glasbruk AB (eerder Gränna Glashytta) is opgericht in 1821 en vervaardigd uitsluitend kristal.
= Gränna Glasbruk AB (earlier Gränna Glashytta) was set up in 1821, made exclusive Lead crystal.
...implies that Glashytta was the name prior to above registration in 1969. So perhaps the first label is 1965-69 (speculation)
The 1821 date throws a spanner in the works although they are not mentioned in a 1907 directory - but it is quite feasible there was a glassworks there prior but totally unrelated except in address