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Coin grading
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==See also== {{Portal|Numismatics}} *[[Mint state]] *[[Cleaning (coinage)]] *[[Cameo (coinage)]] *[[Coin collecting]] *[[Paper currency grading]] *[[Numismatics]] *[[Exonumia]] *[[Proof coinage]] *[[Troy weight]] (The system used with coins and precious metals. One troy ounce (ozt) is exactly 31.1034768 grams, about 10 percent more than the avoirdupois ounce, which is exactly 28.349523125 g.)
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