I have a couple mint racks of Palace Casino (Aruba) $5s with similar swirly designs on the edges.
You might want to mention the *really* nice heavy texture on the face of these chips - totally unlike the typical ChipCo ceramic chip of the day. When I first got my Palace Casino chips, I actually thought they were B&G, whose ceramics have a similar texture on the face. The texture is actually rather similar to that on a Paulson textured inlay.
Here are three photos (including one using flash) to illustrate the “feel good” texture: