Here one for the experts.

The $2.50 chip from the Sheraton Tunica has 3 different UV marks. Two are a small H&C. What is the symbol on the third (CG00721)?

A picture is available on chipguide.com; but for the life of me I can't make out what it is.

I have a Sheraton chip with no UV marks other than a few random flakes that glow when hit with a UV light. Could this be the UV mark; just random flakes?

Thanks in advance.