The Volvo Kalmar plant was opened in 1973 just outside Kalmar, Sweden. The Kalmar plant was one of the most revolutionary automotive production plants in the world. Using Volvo Halifax Assembly and Volvo Torslanda Assembly as examples, the Kalmar plant also introduced the group assembly system. At Kalmar production was carried out on 18 ft. battery-driven carriers, which held one single car body at a time.