Makers of cars for wheelchair users included AC Cars in England,[REF] Fend in West Germany,[REF] Simson DUO in East Germany,[REF] SMZ in the Soviet Union and Velorex in Czechoslovakia [REF].
The Duo was made initially by VEB Fahrzeugbau und Ausrüstungen Brandis (VEB FAB) from 1973 until 1978, whereupon manufacture was transferred to VEB Robur, more famous for making trucks in Zittau.