Nicole recording Violet Ray on her Rickenbacker
The "crested wave" body shape gives easy access to the higher frets on the bass, and was used heavily by Paul McCartney in the mid-1960s to late 1970s. A special "Rick-O-Sound" unit allows the two pickups to be connected to different effects units or amps.
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Shown in a Pumpkins' facebook photo playing Violet Ray, tweeted by @SmashingPumpkin on 2011/06/16, and mentioned again by @Billy on 2011/06/18.