Well I have a 1993p dime I found when i was rolling up my worthless dimes. It has one raised edge that apperes almost to be double the length of the other one. Not sure if its an stamping error or what it is truth be told.
I get these from time to time and have saved a few just to satisfy my compulsive nature. But any new ones I get are just spent. Roosevelts also have a lot of die chips and I save those too. If anything I'm just tying up funds .