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conder101-followup to thin 1970D 1c

Since I can't learn without asking.Please take a look at the following and let me know what you think?
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Random shot of 1c 1970D obv. at 200X
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Random shot of 1c 1970D rev. at 200X
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this is a shot of a 1964 1c obv at 200X that I feel is for sure acid treated.This coin is about same size and weight as 1970D>The look of the 1964 says ACID.
My question is it possible to achieve either effect with an acid if the whole coin is treated?
I am not a chemist and have no clue.
Thanks in advance for any help.
buster75633
RW Coin and Currency
not a commercial site.Just my collection image

Comments

  • cladkingcladking Posts: 28,748 ✭✭✭✭✭
    There are many acids which affect copper and the strenght, purity, temperature,
    lenght of application cause the affected coin to look different. While it's certainly
    possible that there was a real problem with the cent when it came off the die, it
    has been obliterated by the apparent exposure to a chemical.

    This specific coin looks like it may have been in acidic soil, but this can be impossible
    to confirm also.
    tempus fugit extra philosophiam.

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