I know these were discussed in depth several years ago, but in reviewing the background in "Note 3" of TCR, I don't believe these H&C mold chips are Borlands. They don't have molds that Borland was known to use. They have denominations (or at least some kind of numerals) on the reverse. I've had these chips for 10+ years.

With these H&C molds, I don't see the chips at all in TCR. In my opinion they are Las Vegas chips but I don't know their exact intended use. Anyone have more background or comments?