What type of doubling could this be...I have thought Die Deterioration, but this is from a proof 2003-S Missouri State Quarter in a clad proof set. Would this be unusual for a proof die in 2003? What do you guys think? Larry Nienaber

I think that die deterioration is a definite possibility coupled with some possible rotation during the second or subsequent strikes. Of course you remember that proofs are struck a minimum of 2 times. Is it unusual for a Proof Coin? Definitely unusual Larry. Lee