over-grading: the deliberate or unintentional grading of a coin above its true grade. This practice is sometimes used to sell coins for more than they are worth.
Adjectival coin grading was a very subjective and troublesome system, since one man's VF was another man's EF. Coin dealers were often accused of over-grading a coin to get a better price for it.
 See also: Coin grading, Striking, Very Fine, Sheldon, Red
  
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