"Extremely rare serge synth with first a second generation panels (circa 1973-1978). This would make a great item for collectors or anyone looking for a piece of synth history.
First Generation Panel
Top Left (Left Half): Oscillator, Oscillator, Oscillator, Comparator
Top Left (Right Half): Schmitt Trigger, Triple Wave-Shaper, Dual Mixer
Second/Early Third Generation Panel
Top Right (Left Half): Stepped Function V.C. Generator/Smooth Function, Dual Universal Slope Generator, Variable Q VCF (1978 Era)
Top Right (Right Half): Positive Slew, Negative Slew, Dual Processor (1973-75 Era; Unlabled)
Unknown Generation Panel
Bottom Left (Left Half): Mults, Filter, Filter, Ring, Gate, Gate
Bottom Left (Right Half): Gate, Dual Mixer, Bi-Directional Router, Send
Unknown Custom Panel
Bottom Right (Left Half): Unknown Custom
Bottom Right (Right Half): Unknown Custom
I have the label for the 1973-75 era (2nd/3rd gen) module in pdf format if needed (Positive Slew, Negative Slew, Dual Processor). I also have the "Introduction the the Serge Modular Music System" in pdf format."