"I see that in Archie's 2009 Edition book listed as HAR-5b. That appears to be the exact chip. Interesting. Thanks." ... Steve S.

HAR-5b USED TO BE the $5 back up chip for the past several years and the illustrated notched sample was the only specimen known. For whatever reason it is now the current $5 rack chip but the 5b designation will remain. Same chip ... same catalog number.

BTW; I would not be surprised if the remining Harrah's CIC chips currently in use are eventually removed from play and are replaced with the new H&C designs. It would appear that Harrah's AC is rebranding their property by dropping the "Marina" reference.