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Sheldon coin grading scale : ウィキペディア英語版 | Sheldon coin grading scale
The Sheldon Coin Grading Scale is a 70-point coin grading scale used in the numismatic assessment of a coins quality. It is used by nearly all major coin grading companies, the main two being NGC and PCGS. The scale was invented by William Herbert Sheldon. ==Original Sheldon Scale (1949)==
In 1949 the original scale was first presented in "Dr. William H. Sheldon's Early American Cents" titled "A Quantitative Scale for condition" as a way to grade Large cents. The scale is known today as the Sheldon scale.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Sheldon coin grading scale」の詳細全文を読む
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