There is a mold called the Top Hat and Cane mold, THC for short, which is used by Paulson to produce casino chips.
There is a series of Paulson Home poker chips, called World Top Hat and Cane, WTHC for short, which you’ve been collecting recently.
Confusingly, the WTHC chips were not made using the THC mold, but rather with a mold called the “Suits” mold or the “Pips” mold, named after the four suits which appear on the mold.