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Skipping over the dug Heaton in the 1st photo, and moving on to the 2nd and 3rd photos. Interesting on that Pelt in the 2nd photo (which might be an Acme Realer and not a PPP) how the splotchy dark crud is only showing on the orange patch and not the whole marble. I would think that indicates something awry in the molten orange only- some contaminant in the glass itself, and not something picked up on the rollers or the base glass would show this too. The 3rd marble has a lot of surface damage of which appears simply imbedded with grime or dirt, possibly from being buried. This is just what I personally see from the photos. Is it possible to pick up roller crud on only one specific colored part of a marble? That wouldn't make sense but I'm always open to explanations!