I'm thinking this is Post Mint Damage or PMD.
Coins like this are sometimes called 'Campfire Coins,' no matter what the heat source was. The surfaces look to have been damaged as well as darkened.
The improperly annealed clad coins I've seen usually take on a more red/coppery color.
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!!





























