A german company that produced the [[Wiedmann BTX Modul]] for Schneider Joyce. Wiedmann is listed as provider for some Amstrad
support/spares on Cliff Lawson's semi-official Amstrad page, http://web.ukonline.co.uk/cliff.lawson/.
Wiedmann still sells Amstrad/Schneider hardware and software. They do not have a catalogue, but they have lots of products available on request (as of 2009).
The company does still exist in 2010, and they do even still have [[Schneider]] and [[Amstrad]] logos on their webpage: http://www.wiedmann.com - however, they seem to be focusing on older (pre-computer) hardware now, see screenshots below.