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Proof coins graded 60 to 70 are mirrored to those of Uncirculated grades with the difference that the coin was not made for circulation. Proof coins with the grade of PR-63 are sometimes called "Choice Proofs". [25] Proof coins that are below the grade of 60 and show signs of circulation or mishandling have been classified as Impaired Proofs ...
Coin grading [1] is the process of determining the grade or condition of a coin, one of the key factors in determining its collectible value. A coin's grade is generally determined by six criteria: strike, preservation, luster, color, attractiveness, and occasionally the country/state in which it was minted. Several grading systems have been ...
Certification agencies can grade and assign numerical ratings for proof coins. A PR70 coin is the highest grade possible for a proof coin and indicates a perfect example, with PR69 and lower grades reflecting some deficiency in the strike, centering, details, or other aspect of the coin. Most proof coins are double struck under higher pressure.
The NGC grading scale is based on the 70-point Sheldon coin grading scale. Strike designations include Prooflike and Deep Prooflike for circulation issue coins and Cameo and Ultra Cameo for Proof coins. Coins deemed high-end for their particular numeric grade receive a "Plus" designation. Coins considered attractive get a "Star" moniker.
The 2009 proof set contained the highest number of coins and the highest combined face value ($7.19) of any proof set as of 2019, containing the four Lincoln Bicentennial cents (with a special composition of 95% copper), all six District of Columbia and United States Territories quarters, five dollar coins, and the standard nickel, dime, and ...
This proof coin, a restrike of the original, brought in $2.3 million. It is highly prized due to its rarity and the storied history of when and how these high-grade 1804 Silver Dollars were struck.