If you look closely at these two chips, they have a "BB" stamped on them. One side only. More noticable to the eye than in the scan. Question is, why ? What were they used for? There's no mention of any kind of cancellation in TCR, so I wasn't leaning in that direction. Used in different sections of the casino ? I don't know. Do you ? I have another identical to the $5. that has no stamp. Should these be added to TCR ? Any help from the experts greatly appreciated.

Thanks.......Rick