POLYPHONIC VOLTAGE SOURCE MODEL 228 for 200/200e systems

• 48-note chromatic pressure-sensitive keyboard with pitch-bend
• up to 4-voice polyphony
• polyphonic glide
• arpegiator
• 2 ribbon sliders
• touch-pads
• random pulse source
• offset section
• 6U size
• different scales (1v/oct, 1.2v/oct, 2v/oct)

https://www.muffwiggler.com/forum/viewtopic.php?p=2266032

No info about availability.