Has anyone seen one of these?

This chip is not in the Staeffler guide.

A rubber stamp on a blank chip..I guess it is legit, but I hadn't heard of such a thing..

http://cgi.ebay.com/ALS-CARD-ROOM-JACKSON-CA-California-Casino-1-Chip-/330514713202?pt=LH_DefaultDomain_0&hash=item4cf4364a72