SEQUENTIAL CIRCUITS PRO-ONE SN 8007

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via this auction

"This is the last edition of the Pro-One (1982) with the power supply NOT on the motherboard but separate, as it should be. Serial No.#8007

- The J-wire keyboard has been completely rebuilt with new J-wire, as good as new.
- Old Op-Amp has been replaced with a better, lower noise Philips Op-Amp.
- Any old cracked saudering has been repaired etc...
- Every Pot as been cleaned
- OSC etc.. all re-tuned/re-calibrated
- Its now as restored to the same level when it left the factory in 1980!!"