Yes, the "standard weight" chips are described as being made out of "Paranoid" material, which I think you pointed out some time ago was a proprietary term used just for USPCC chips.
More evidence, however, that the "mercury" heavy weight chips were made by
TRK are their order cards, which by the early 1950s list detailed clay/dye formula tweaks, that they are experimenting with, which you would not see if
TRK was a mere distributor. They also list lots of lead. Below is an example of that, which I posted elsewhere.
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