Altered Surfaces
A designation given by PCGS and NGC to coins which cannot be certified due to the coin’s surfaces being altered from their original state.
Altered surfaces
Cleaning or other impairment that renders a coin less desirable to collectors.
Alteration ...
Altered Surfaces - A designation given to coins which cannot be certified due to any number of alterations to its surfaces after it left the mint. Such alterations include cleaning, lacquering, tooling and artificial toning.
Altered Surfaces - The Coin Doctor strikes again! That mischevious devil tries to cover a coin's defect to trick the graders into a higher grade. A coin with altered surfaces has generally had a foreign matter applied to it.
 See also: Surfaces, Altered, Struck, Mint, Grading
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