Don,

I got about 50 of these chips combined. Looking at the chips in a box, you clearly see 2 different colors. All of the darker colors have a rounded edge. The lighter color chips all have a square edge. It could very well be the same dies used on both versions for the hot stamp, but the chips themseleves are different. I would be glad to send you one of each for your examination. Or I could even do a HI-RES scan.