Vintage Roland System100M 191J 121 121 140 172 132 Set with Upside Down Serial Number

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"Comes with Original "Sound Sample"Pamphlet by Roland.

-191J SER.No.961385

-121 SER.No.071693

-121 SER.No.132236 a low pass to a high pass filter remodeled by Roland. you can control voltage, but not the filter outgoing.

-140 SER.No.072260

-172 SER.No.990502

-132 SER.NO.010735"


Thought the upside down serial number on one of the 121s was interesting. Curious if it came out of the factory that way or somehow happened later.