Here are 3 Caesars Tahoe promotional chips. I believe the red one is in TCR as V2218 as obverse and reverse are the same. I don't have N8052 to compare it with, though. This chip is serialized both sides and should have the S/N note added. All chips in this scan are 44mm in diameter.

The center chip is not listed. It's orange/grey/purple/ and black... a very unusual design that seems to have an oriental feel. It's not serialized and different obverse/reverse.

The final blue 500 might be N0565. However, this chip is dated 1996 and has the Texas Winter Weekend legend that isn't mentioned in TCR. It is serialized both sides and obverse/reverse are the same, again seeming to rule out the N0565 listing.