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  2. Professional Coin Grading Service - Wikipedia

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

    These values pertain exclusively to coins that have received PCGS certification. The data for these values is sourced from various channels, including dealer advertisements and price lists, realized auction prices, and transactions that occur during trade shows. [17] [18]

  3. List of most expensive coins - Wikipedia

    en.wikipedia.org/wiki/List_of_most_expensive_coins

    Heritage Auctions August 18, 2021 $2,350,000 1808 Quarter eagle United States Sotheby's/Stack's Bowers [38] April 20, 2015 $2,350,000 1793 1793 Cent Chain S-4 United States Heritage Auctions [39] January 2015 $2,300,000 1804 Bust Dollar United States Adams, Carter Heritage Auctions: April 2009 $2,280,000 1928 Dollar Pattern China: Stack's ...

  4. Numismatic Guaranty Company - Wikipedia

    en.wikipedia.org/wiki/Numismatic_Guaranty_Company

    The NGC Census reports how many examples of each issue NGC has certified by grade, which helps determine relative rarity. Census figures are often falsely inflated due to resubmissions of the same coins. NGC Coin Price Guide lists pricing data for most US coin (and some modern Chinese) issues. NGC Auction Central reports auction prices realized ...

  5. 1933 double eagle - Wikipedia

    en.wikipedia.org/wiki/1933_double_eagle

    In 1933, in an attempt to end the 1930s general bank crisis, U.S. president Franklin D. Roosevelt issued Executive Order 6102, which provisions included: . Section 2. All persons are hereby required to deliver on or before May 1, 1933, to a Federal Reserve bank or a branch or agency thereof or to any member bank of the Federal Reserve System all gold coin, gold bullion, and gold certificates ...

  6. Ides of March coin - Wikipedia

    en.wikipedia.org/wiki/Ides_of_March_coin

    The majority of the coins were struck in silver, but there is an exceedingly scarce variety of the coin struck in gold. On October 29, 2020, one of the gold variety sold at the Roma Numismatics auction in London, for £3,240,000 (US$4,188,393).

  7. A Guide Book of United States Coins - Wikipedia

    en.wikipedia.org/wiki/A_Guide_Book_of_United...

    Delayed until the end of World War II, the Red Book was published in 1946, providing collectors even more historical information as well as retail values (prices collectors could expect to pay coin dealers to buy coins) instead of wholesale values. R. S. Yeoman served as editor of the Red Book and Blue Book until he retired in 1970.

  8. Sheldon coin grading scale - Wikipedia

    en.wikipedia.org/wiki/Sheldon_coin_grading_scale

    A selection of three Walking Liberty half dollars of various coin grades and years, ranging from AG (About Good) to AU (Almost Uncirculated).. By 1953 the original Sheldon scale had become outdated.

  9. Collectors Universe - Wikipedia

    en.wikipedia.org/wiki/Collectors_Universe

    On January 30, 2019, it took back the division and has rebranded it PCGS Banknote. [4] [unreliable source?] [5] In October 2012, Collectors Universe's division PCGS (Professional Coin Grading Service) authenticated the 25 millionth coin (PCGS Secure Plus MS65) from Japan, being a historical milestone of the company performance. [6]