It looks like extreme Die Deterioration but weighs at 5.5g is this some form of PMD? It has normal looking reeding for the amount of circulation its seen.
@dec, being underweight and having that dimpled surface makes me think that this coin has been exposed to a corrosive environment, perhaps being immersed in acid. When you look at the edge, does it look like the copper core has been eaten away?
"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
Yep, that would be my guess too - this coin had spent a lot of time in a caustic environment, whether in the soil or dipped in vinegar or acid is hard to tell.
Correct answers. great jobs! All get an 'A'. Welcome to becoming teachers. More than a yes or no, but what happened to the coin, so they OP's know what to look for on these and why are not a mint error, but an altered coin.
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