While roll hunting I saw this coin while observing all coins on edge when first removed from roll. This coin stuck out like a sore thumb since it is so much thinner. I don't understand why there is no edging, this coin is smooth all the way around and has little flaring out on the edging. If someone took the time to remove the edging they did it perfectly. This coin is perfectly round. It weighs 11.119 grams and the average grams on 4 regular Kennedy half's ranged from 11.123 to 11.263 and USA Coin bk says the coin weighs 11.35 grams. diameter should be 2.15 MM but this coin is 1.91 MM. So what do I have here? Thanks.