The coin doesn't look right to me, I agree with Sap that it looks like a cast copy. The details are all mushy on this coin yet it doesn't appear to have much circulation wear. Can you post sharper photos of the edge? That is usually the easiest way to spot a copy.
This coin is common as a salvage coin, that could explain the weight and porosity but I would need to hold the coin and examine it to make that determination.
This is a hard year to find undamaged in high grade
This coin is common as a salvage coin, that could explain the weight and porosity but I would need to hold the coin and examine it to make that determination.
This is a hard year to find undamaged in high grade


























