I know there's ROT and LOT mold variations...

I know there's concentric circles vs. smooth center variations...

I don't remember seeing this one mentioned....

I was looking at a couple of Silver Slipper chips that I thought were the same. I noticed that the lines making up the suits on the edge of the mold are thicker on one chip.

I don't know how well you'll be able to see it in my pictures.....