I was playing 3 card poker and hit a couple of straight flushes with some of the bonus bets.
I didn’t notice any serial numbers on the chip...but I didn’t look too hard either.

The NCV chips have serial numbers...and they are totally oversized. Possibly bigger than 48mm?? I actually got to check one out($100 ncv) with the cage manager, but unable to get one. (I offered to trade a live $100 for it)😩

I have images , but I don’t think I should share them publicly. They come in ...
$100
$500
$1000
$5000
Nothing smaller (yet)