Very unusual 2008 P Oklahoma quarter 1 1

[Mr.Bill347]

I received this coin in some cash register change today. Very unusual finish. Dark colored grey/brown, somewhat pitted surface, no evidence of layering on edge like most clad coins. Wondering about incorrect planchette, or experimental finish treatment as there seems to be no nickel plating. Just inquiring mind not being at it too long. Picture compares finish to conventional clad quarter and the edge.

 

[Oldhoopster]

Sorry, but your coin suffered environmental damage. It looks like a coin that has spent some time in the ground.  Regardless of what caused the damage, it didnt leave the mint looking like that.

[Mr.Bill347]

Thank you! 

[bsshog40]

Agree.