
via Retro Synth Ads, where you'll find the write-up.
"Oberheim OB-1 programmable lead synthesizer "Holiday '78" 1-page black and white advertisement from page 25 in Contemporary Keyboard December 1978."
EVERYTHING SYNTH

via this auction
there are 4 'patches' located in GREEN pairs around the 42 (silver) bend points. you can modulate the amount of interaction between any set of bending points by routing separate bend points through the patches. there are 2 special fine tune-10 turn knobs/pots and 2 standard tune pots located on the far right where the speaker USED to be. both internal speakers have been removed to make room for the added parts.
located on the back are 2 reset buttons (one for battery operation the other for AC adapter power) for when the machine crashes and cannot be reset by simple on/off switching. I also have added a new DC jack as the one that Casio put on there just isn't very good!"