Dean's response to my e-mail:

Hi Mark,
Thanks for the heads-up. I didn't know anything about this chip and had even
asked a couple people about it that didn't know either. I thought the NM was
just a misprint of NV for Nevada and that it was probably just a tournament
chip. I will take it down and relist it later when I find out more. I saw
the pictures in your link, but when was it made? And was it just a fantasy
chip? Thanks for the info, and sorry, but I don't know about every chip that
I find.
Regards,
DEAN