Now I see what you're saying. The book (TCR) shows 3 different orange $1 chips with a combination of mold/insert descriptions side-by-side: N8880, N1975 and N5931, along with an inlay description of a "large" $1 and a "small" $1. Either you've come up with a fourth chip, or there is a key punch error in the mold/inserts column. By any chance, are the suits on your "6SO" incuse or flush as are injected molded plastic chips? John