Ex-squeeze me, Don? TCR lists 4 variations, as combinations of tall or fat 50¢, and white or dark inlay. TCR doesn't say anything about canes on this chip. I could agree that darker inlays could be age or staining, I don't know. I do know that all the chips I've seen were consistent from side to side. If it were a staining or age thing, wouldn't you expect to find chips more "aged" on one side than the other?

The "new" variation I'm showing is the canes.