360 Sound vs. 360 Sound

Hey Mikey- I have a question you might post and answer since it's general interest, I think. In your recent Freewheelin' Bob Dylan review you mentioned the white and black label Stereo 360 records from Columbia, and you mention that the black label indicates Columbia's all-tube cutting chain. Are all the white labels then on a solid-sate chain? What's your general impression of sound quality between the two, and how long did Columbia issue black label pressings cut on tubes? Thanks! -- Shane

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