Several of the higher denomination brass-core chips from Harrahs have geometric symbols around the edge. I've identified a triangle and an arrow.

The one on the pink 500 has a name but I can't remember what it is. It appears to be formed by three arcs that transition to circles at each apex. Who can name it?

By the way, one of these (not mine) can be found in Doug Saito's auction that preceeds the Super Show in Las Vegas next month.

There are two varieties as with most of Harrah's brass chips. This is the one with serifs on the letters forming Harrah's. Serif varities also have an apostrophe rather than a star forming the possessive of Harrah.