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  1. Chort
    Post

    Some oxidation on the copper coin

    I thought NGC provides warranty for the copper coins up to 10 years. So if the coin slabbed less then 10 years ago, they should re-slab it for...
    Post by: Chort, Jul 6, 2017 in forum: Coin Chat
  2. Chort
    Post

    Some oxidation on the copper coin

    Thank you very much! I did see it on Heritage pics, but never looked at it with high magnification. Will try to ask NGC first I guess...
    Post by: Chort, Jun 24, 2017 in forum: Coin Chat
  3. Chort
    Thread

    Some oxidation on the copper coin

    Hi, I was reviewing my coins, and found a very unpleasant surprise. On my 1831 EM russian copper 10 kopek coin in NGC slab I found, what I think,...
    Thread by: Chort, Jun 24, 2017, 45 replies, in forum: Coin Chat
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