1937 Australian Proof Crown ANA Certification service.

Discussion in 'World Coins' started by Bob Evancho, Oct 8, 2017.

  1. Bob Evancho

    Bob Evancho Active Member

    Not quite cleaning. I acetoned it based on the instructions I was given to remove the PVC, poly vinyl chloride, oil residue. As show and tell for two coin clubs I belong to, I teamed this Proof 1937 with choice AU examples of circulation strikes of 1937 and 1938.
     
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  3. 7Jags

    7Jags Active Member

    The 1938s in unc. slabbed grades still seem to fetch rather a lot though....
     
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  4. oz_in_ohio

    oz_in_ohio Active Member

    No matter what you did, if you used so substance to get residue off, YOU CLEANED IT!!!!
    There is no middle of the road...it is like a black and white situation with no shades of grey or gray. However you think what you want but if you did anything to the coin, you have taken away the natural look.... Speaking as a retired dealer.
     
  5. oz_in_ohio

    oz_in_ohio Active Member

    Do you want a medal or something???? Why dont you show it on here or are you afraid people will see you cant grade properly???
     
  6. Oldhoopster

    Oldhoopster It seemed like a good idea at the time.

    I think your confusing cleaning a coin to remove toning (where the metal on the surface has reacted to form sulfides or oxides) and using a solvent to remove organic contaminants

    Acetone only removes organic contaminants that are adhered to the surface of the coin. It's not considered harmful cleaning since it doesn't affect the coins surface and will not affect the value (assuming the toning of the coin matches the surface under the organic material). In some instances such as PVC plasticizer, failure to use a solvent like acetone will result in permanent damage to the coin.

    Hope this clarifies things
     
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  7. Maxfli

    Maxfli Well-Known Member

    It should. But I'm betting it won't. :D
     
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