this is defl. not a V76 nor a V241.
You find Pictures of the V76 everywhere, here is a link to (finished) Auktion:
http://cgi.ebay.ch/2-RFZ-studio-tube-amplifier-preamplifier-input-1-60_W0QQitemZ220492235751QQcmdZViewItemQQptZRadio_TV_Musik?hash=item33565c83e7&_trksid=p3286.c0.m14 for V241 pictures.
Could you make some more photos and write down the name(s) of the tubes (incl. manufactorer). This may help to exclude West/East Germany..
Especilally a picture of the wiring could help...