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this auctionvia the description:
"Sequential Circuits Prophet 10, Rev 3 with the Curtis Electronics IC chips. Analog 10 voice polyphonic synthesizer serial # 91 manufactured 1981 in very nice cosmetic but not mint condition, it has the expected very minor scuffs/scrapes here and there for a 30 year old musical instrument ,but no dents/dings or other damages anywhere. The Prophet 10 has the early basic MIDI circa 1984 in/out only retrofitted by SC, according to updated addendums to the original SC manual updated through 1982,83-84. This classic analog synth also comes with 5 original SC foot pedals and a custom Ultimate A-frame type adjustable height stand to hold the synth, and original SC owners manual dated Sept. 1981, and a very nice custom made Anvil flight case with heavy duty casters which protects the synth and the pedals. Included also are several replacement rare HTF Curtis chips for extra backups, that came with this synth when I bought it from the original owner who owned this synth since 1982. No dead keys or voices, and there are no broken or missing knobs, buttons or controls anywhere The synth functions 100% except for the onboard poly- sequencer and obsolete micro-cassette tape drive, which may work fine but, I have not used them at all so I, cannot really verify that this section of the synth is 100%..."