(c) 1986 (box side & rulebook), 1989 (box side), 1991 (box back). Box side has the Danish "Årets Aktivitets-Spil 1985" award tag. Norwegian rules are not mentioned in the box front tag and Norwegian text does not appear in the box back (unlike the other four) but it is included in the rulebook.
First product number appears on the box, second one in the rulebook. Rulebook credits 'Autor' to Projekt-Team III, design to Erika Bintz-Blanke.