I have this beautiful C/J H/C (shiny hats) purple, Free Play Thunder Bird chip. The hot-stamp (gold) indicates that the $1 free play is good only for:

"CRAPS-BJ-B-G-6"

I know what "CRAPS" and "BJ" are, but what do the "B", the "G" and the "6" refer to?

Thanks,

Jim