Vintage August 1982 - Made in Japan - First few months of production! Pure Analog Octave goodness - Very filtery, very synthy very awesome! This unit is in all original circuit condition. The OCT1, and OCT2 potentiometers have been replaced and one knob is a later replacement. Otherwise it is also in excellent cosmetic condition. Early issue requires 12 Volts DC (centre negative) as per the original Boss ACA adaptor, for correct operation.