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  2. Professional Coin Grading Service - Wikipedia

    en.wikipedia.org/wiki/Professional_Coin_Grading...

    Printed on the front of the blue paper insert is the coin's type, denomination, grade, attribution, pedigree (if any), serial number, Universal Product Code (UPC), and other pertinent information. [11] [12] First-generation PCGS coin holders are smaller and lack the raised stackable edges of later issues. Their insert was printed on plain white ...

  3. Coin slab - Wikipedia

    en.wikipedia.org/wiki/Coin_slab

    Reverse of PCGS coin slab with hologram in upper right corner. Slabbing coins is a practice which began in 1986. The grading of coins was a way to remove coin grading controversies by having a third party certify the coin's condition. [1] The earliest coin slabs introduced by PCGS were in use from 1986-1989.

  4. Third-party grading - Wikipedia

    en.wikipedia.org/wiki/Third-party_grading

    Third-party grading (TPG) refers to coin grading & banknote grading authentication, attribution, and encapsulation by independent certification services.. These services will, for a tiered fee depending on the value of the coin, "slab" a coin and assign a grade of 1–70 on the Sheldon grading system, with 1 being the lowest grade, with only faint details visible to 70, a practically perfect ...

  5. Coin grading - Wikipedia

    en.wikipedia.org/wiki/Coin_grading

    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.

  6. Certified Acceptance Corporation - Wikipedia

    en.wikipedia.org/wiki/Certified_Acceptance...

    CAC has evaluated over 650,000 certified coins with a value of over $2.9 billion. The company has over 400 dealer members and over 500 collector members. The firm's website maintains a free serial number verification service, which helps deter CAC sticker counterfeiting, and Population Report, which assists in determining coin rarity. [9] [10 ...

  7. Sheldon coin grading scale - Wikipedia

    en.wikipedia.org/wiki/Sheldon_coin_grading_scale

    In modern-day United States numismatics, collectors, coin dealers, and third-party grading services grade mint state coins using a number from 60 to 70 inclusive, with 70 representing a perfect coin with no visible blemishes.

  8. Numismatic Guaranty Company - Wikipedia

    en.wikipedia.org/wiki/Numismatic_Guaranty_Company

    Since 2009, a scratch-resistant holder coating, similar to that used on eyeglass lenses, has been employed. NGC offers Oversize holders for coins larger than 45 mm and up to 120 mm, and Mega holders for coins larger than 120 mm and up to 180 mm. [12] NGC's label lists a coin's denomination, variety, grade, pedigree, serial number, and other info.

  9. Washington quarter mintage figures - Wikipedia

    en.wikipedia.org/wiki/Washington_quarter_mintage...

    Eagle reverse, 1932–1964 (Silver) Year Mint Mintage [1] [2] Comments 1932 (P) 5,404,000 D 436,800 S 408,000 1934 (P) 31,912,052 Doubled die errors are known.