04/30/2009. Remarks by Johan Visschedijk: "On April 10, 1973, this aircraft was registered as DM-WMZ to the Gesellschaft für Sport und Technik (the East German Aero Club) and used for training. In 1981 the country prefix DM was changed to DDR, so the aircraft became DDR-WMZ. After the unification of East and West Germany in 1990, the aircraft has been stored for a longer period."