Bicentennial Kennedy half missing clad area?

The surface of the coin all feels the same. I don’t feel a bump where the clad area changes color to the area that appeared to be “copper”? Most likely just some weird discoloration but just wanted to see what y’all think. Thank you for looking.

 

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Partial Missing Clad.
But.. I can't tell if it occurred at the Mint or it was created post mint.

 

I agree with Paddy but I'm thinking PMD be duse it looks a bit green on the edge, right where the clad stops.