OSCar Synthesizer

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Roland D-50

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Yamaha SK20

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Roland SH-2

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"Sh-2s are not terribly rare, but 117v versions like this one are extremely scarce. No voltage converter required! This SH-2 was originally built for and sold in North America."

KORG Polysix

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"The serial # is 460602 and it was made in Tokyo, Japan by the KEIO electronic Laboratory Corp. It has 61 keys and can play up to 6 notes at once, hence the name PolySix. It also has an attached power cord that wraps up in the back."