Roy imagine a puzzle that fits together from the bottom to the top.
See the red in between the two yellow inserts, that would be 1 piece of the puzzle(bottom piece) , then the next piece would have the 2 yellow inserts and the third piece would have the "dice suits''. The possibitlites are endless as they can have various shapes on the mold along with colors and even the dollar value on the mold. Hope I did not confuse you.. If you can find the book "A Collector's Guide to Nevada Gaming Checks & Chips" by Howard & Gregg Herz it clearly explains it.