Below is an image showing two different $1 chips from Harrah's in New Orleans.
I found this puppy while looking at the chips with my trusty UV light. Noting that the orientation of the UV H&Cs and after doing an overlay of the two images, it was apparent that the "$" was different, as well as the thickness of the "1", then the length of the bar between "HARRAH'S" and "NEW ORLEANS"

Sorry I don't have any dups...

So what do you think Greg?
Also Jim Batton - any comments?