I have a few chips with sevens, eights and nines. How were these used? The chips I show with the 6 and 9 I don't have any higher than the number 9. The strange styled 8 chip I have from 1 to 9 then the other numbers are 20,25,50 and 100. It seemed to be a soft plyable material some how recessed into the chip slightly. Strange.