These are unusual. Both for the fact that few casinos issue 10c chips anymore, let alone 20c chips any time! Also, the design on the BJ's chips has a background of dots, which I was told was supposed to indicate a decimal point in front of the numbers. They all appear to be Chipcos and are 10 years or so old.

Your choice for a dollar. $2 shipping for any number of chips. Take all four chips for $5 and I'll pay postage in USA.