Archived Articles

These are some of the top recent articles on coin identification, bidding, buying and selling, with tips about common flaws, grading, holdering and more.

  • Die Polish, Hairlines and Slide Marks

    Die polish lines look like cleaning hairlines and album slide marks, but there are distinct differences, with die polish and slide marks having no effect on straight grading and hairlines, earning a Details grade from major holdering companies.

  • Seven Mercury Dime Doubled Dies

    Mercury dime doubled dies are rare and valuable, surviving the big silver melting pot of the 1979-80 when silver rose dramatically.

  • Crossing Over Coins

    There are many reasons to submit coins for crossover service: You might have coins in lesser-tier holders. You might want to change companies for set registries. Or perhaps your holdered coin is damaged or cracked, giving you a reason to try another company. Maybe you have a coveted green PCGS first generation holder and now…

  • 1935 DDO Cent

    Officially known as 1935 Doubled Die Obverse (DDO) FS-101 variety, this coin has significant doubling, especially on the date, and is sought after by collectors.

  • Standing Liberty Varieties

    The first two years of the Standing Liberty Quarter resulted in seven varieties: 1916 key date and 1917-P/D/S Types I and II. This article defines markers and designs so you can distinguish among these coins.

  • Presidential Dollar Varieties

    With the 2026 Semiquincentennial President Donald J. Trump $1 Coin, people are having a renewed interest in presidential dollars. Trump was not part of the series. Launched in 2007, the series requires a president to have been deceased for at least two years to appear on a coin. Trump got around this requirement as his…

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