This Roland Sys 100m (191J) is a stellar example of this famous modular synthesizer from Roland. Modules included: M-112 dual VCO, with 3 CV ins, 2 outs, and weak/strong sync M-121 dual VCF, with low-pass and high-pass filters with 24 dB/oct slope M-130 dual VCA, with a linear/exponential switch M-140 dual Envelope (ADSR, invertable, and manual gate button) and LFO (5 waveforms with switchable range: x1, x1/10) M-150 Ring Mod, Noise (pink and white), S&H (with lag), and LFO (5 waveforms with switchable range: x1, x1/10)
If it weren't for some relatively minor scuffs on the wood, it is in almost perfect condition. If you look at the panel shown in my included image, you will see a lovely example of this amazing vintage synth.
