Actually Archie is the AC expert - but (I think I need to add this, don't I Archie?) USING BLACK'S NUMBERS - there are a minimum of 4 $1 Harrah's Trump Plazas

http://www.geocities.com/mschips_az/PG5_HARR_AC.html

Secretly I'd say 6...
- but sometimes around here "variations" is a magazine... NOT chip related.

In your scan, your chips appear to have different colored rings... so yup - they are different chips.