
via
this auction
Description in Googlish:
"This kit, published in 1979 by the magazine Elektor, is a monophonic analog synthesizer module within the meaning of the legendary Moog.
I bought it in 1980 for about 2000 DM with a friend (we were at that time students of electrical engineering), lovingly, expertly assembled six weeks of legwork. As shown in the photographs, it consists of:
· Module frame in walnut veneer
· 3 VCOs (Voltage Controlled Oscillators)
· 1 VCF (Voltage Controlled Filter)

· 1 VCA (Voltage Controlled Amplifier)
· 2 ADSR (Attack, Decay, Sustain, Release)
· 3 LFOs (Low Frequency Oscillators)
· 1 Noise Module
· 1 COM module
· 5 octave keyboard
Various · connection
· Building and Operating
In addition, we have built for the first VCO some "gimmicks", such as sawtooth and pulse width control in a kind of simple sequencer based on a gated binary counter, etc."