I picked up a couple chips with a common star and crescent design. One of the chips has a very noticeable raised rim on both sides. I feel it's just a manufacturing glitch with pressure in the molds. I really don't know how the raised rim would happen. Has anyone seen this before, in what should be a plain mold chip? I wonder if there's a set of similar chips out there. The picture here is of both sides of the same chip.