I agree about the history part.

The last time I talked with Kenny was about two years before he passed and the Tiger chip came up and I remember him telling me he only had the cracked one which seemed strange. It came up in the conversation when he was explaining the reason they would fracture in the ring was because the turners probably did not realize having the ring in the same exact distance from the edge on both sides would be the weakest part of the chip in a rough game... Only a dentist would know that.

I think Hanover has all the known rim varieties.

I had the narrow rim and most of the wide rim examples has cracks.