via this Vemia listing
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"This is a unique instrument: a classic Yamaha CS50 originally owned by the late Juergen Haible, one of the great synth design explorers of the last 30 years. He died in 2011, less than a year after I drove to Nuremberg to collect this by hand.Many of his designs and explorations of classic synth and effect architecture found their way into top musicians' possession and have stayed there - I've delivered several to their studios,and they are still there decades later.
The CS50 is great in its own right as one of the warmest, most organic synths ever made, with a wonderful keyboard action and user interface. But this one is unique: Juergen's custom modification turns it into a modular controller as well.
The custom 19-inch rack connects to the CS50 with a set of DIN leads, and acts as a wonderful controller for a modular - or any suitably equipped monosynth. Although the polyphonic features he planned hadn't been completed, it still turns this instrument into something even more powerful and unique. A copy of Juergen's invaluable paperwork is included.
Cosmetically, the CS50 is a bit tatty at the back and is missing the cover for the mains lead on the underside, but is otherwise generally good. The important bits - keys, controls, front panel - are very good.
The rack is excellent, with (we presume) Schaeffer etching. Self powered (230V). Open frame construction behind the front panel, so it must be safely installed in a professional rack.
Two V/Oct outputs with high/low note priority, tune and transpose functions. It also brings out CVs for Aftertouch, PWM oscillator and Sub Oscillator. The 5-pin DIN jacks are *polyphonic* V/Hz outputs - they were intended for a polyphonic modular system, which was never realised. What you use are the 1/4 inch V/Oct outputs.
Checked over by Hideaway Studios in October 2020. I'm ashamed to say that it has sat wrapped up on a shelf ever since, waiting for a studio re-organisation that hasn't happened. So it may need a further check-up. Packing 48GBP - precious and heavy, with two carefully designed packages."
