Does anyone know about the corroded 1977 d quarter that only weighs 5.40 grams and was black when I removed the corrosion to identify it. I removed all of the corrosion with a toothpick so not to scratch it. I have heard of one other that was thought to be on a V nickel planchet which of coarse is 90 years earlier.
It reminds me of a coin that has been buried for awhile. A lot of metal detectors have a lot of these. Another thing that can turn a coin black is it being in a fire. This is not something that came that way from the mint. There is nothing in the minting process which would make something like this.
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Thank you for your input. The thing is I couldnt even see the coin until I scraped off the corrosion and it came off pretty easy. But I have seen one online that wasnt scraped off and it was the same coin even down to the weight.
There are a lot of such quarters around, not surprising that you saw another. Environmental damage will leave it looking like that. Rest assured there has not been a Washington quarter identified as being on a V nickel planchet! Quarters have been struck on regular nickel planchets but then it would be the weight of a nickel.