Oberheim Oberheim Voltage Controlled Filter VCF-200 70s White 70's | Reverb
Oberheim OB-Xa - Wikipedia
reverb.com - Though lesser known and exceedingly rare (we've only ever had one other listed on the site), the Oberheim Voltage Controlled Filter was used by Frank Zappa in a number of
MATRIXSYNTH: Oberheim VCF-200 Analog Synth Filter S/H Pedal