Made circa early 80's although some report these back 1979. Curtis chips and banana jacks. Basically the modules include Amplifier, VCO, VCO, Noise, Random, LFO, S&H, Ring Mod, Mixer, Multimode VCF, VCA 1, VCA 2, then the module on far right was specially made as an extra which includes 2 extra mixers in and out with adjustable pot plus the 2 jack inputs at the bottom of the module are for CV and Gate.

The second Oscillator is currently hard wired to the first as there is a problem with the spring push button "KBV" . 

includes:
VCO 21 120
VCO 21 120
MFM 21 160
VC-ADSR 21 150
VCF 21 130
VCA 21 140