More information about Die Deterioration?
http://goccf.com/t/317950Retired U.S. Mint Coin Die Set information.
http://goccf.com/t/3029611988 P
LMC RDV-006, 1998 P
LMC Wide AM, and 2000 P
LMC Wide AM.
http://goccf.com/t/327834 http://goccf.com/t/294303 http://goccf.com/t/312900 1973 D
Lincoln Memorial cent With Recurring Die Subsidence Error Information.
http://goccf.com/t/304624 Machine Doubling tutorial.
http://goccf.com/t/332421Die states progression on coins. Scroll down, so you can see the different die state progressions.
http://goccf.com/t/325638Die Deterioration Doubling Tutorial.
http://goccf.com/t/336470