@kgill, for sure the surface of these quarters is not the "typical" color. A great first test for confirming a wrong planchet vs. environmental toning is to simply weigh the coins. If they are within mint specs or at least close, you almost certainly don't have a mint error. To that end, please weigh these and add the results to this thread. Thx.
"If you climb a good tree, you get a push." -----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz
The Alaskan quarter looks interesting (showing some signs of luster), pictures of the coins edge would be very helpful...Montana (IMO) is a spender and Nevada was caused by heat being applied (IMO)....
The coins are coated with a coating from toning or an outdoor find. Note the highest areas on the coin? They will turn back to the natural color with circulation. But a missing clad will never turn back to normal, because the new normal for that coin is the copper core. All spendable.
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