.........for on the Harrahs Roulette Chip from Atlantic City.

There are 63 Chipco Roulette chips from this Series of Harrahs Atlantic City Roulette chips but they are not listed in the Chip Guide for some reason. Your chip is from this Series.
Please see the pages below from my R.I.C.H. Atlantic City Roulette Catalog which give details on these chips. Also shown is a page from my collection showing these chips in full color - your chip is the one at the bottom right hand corner of the scan.
Take care,
"Mr. Roulette"