5. Deterioration of Certain Coins
. The NGC
Guarantee does not apply to certain Coins where the appearance of the Coin changes or deteriorates over time and such change or deterioration is responsible for any discrepancy between the assigned grade and the Coin's actual grade. NGC
shall make the sole reasonable determination as to whether this deterioration has occurred. The following specific parameters apply:
a. In certain Coins, natural environmental deterioration may cause undesired features to appear, such as (but not limited to) spotting, hazing, PVC and corrosion. Spots, for example, can occur on modern silver Coins as a result of the minting process or other natural conditions over which NGC
has no control. Therefore, the NGC
Guarantee does not apply to Coins exhibiting any of these issues.
b. Coins made of copper, bronze and brass or are copper-plated can change over time. Accordingly, with regard to copper, bronze, brass or copper-plated Coins graded by NGC
, the grade portion of the NGC
Guarantee will no longer apply after the 10-year anniversary of their date of encapsulation by NGC
. The expiration date of the grade portion of the NGC
Guarantee can be found by entering the Coin's certification number in the Verify NGC
Certification section of the NGC
website or by contacting NGC
has covered themselves pretty well, to include silver and gold coins not just copper.
At least with the a copper coin, doing a cert check tells you when the coin was graded