Wanted to share these with the group, I have dupes of the (blue chip) for $12 shipped. (same both sides)
These were found together and I believe this is as good of an ID on the diamond chips as we are going to get.
I'm using ink on my flip...

The guide shows three other chips for the club including a diamond mold yellow OS & a black $1 OSB
EVERYTHING SEEMS TO FIT!

http://www.themogh.org/cg_chip2.php?id=SDDEOS