Hi,
Schauff is usually pretty nicely documented at a german Webpage (it looks oldfashioned, but bikes are nicely listed per model year).
Just it seems that not every model or variant made it in their official catalogs etc. and on this page.
The High-Voltage "Drive side fail" ECS is showing up in the 1991 line-up
Museum der ersten MTBs Schauff 1986
www.mtb-museum.de
but it seems it was also available in other colors or later years (maybe till 1993?)
