Rockwell Hardness Test or backyard test?

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  • jmangham
    Member
    • Oct 2014
    • 990
    #1

    Error Other | Rockwell Hardness Test or backyard test?

    As soon as I saw this I thought of the article on the CONECA website. I'm figuring PMD since you can see the design elements inside the impression on the reverse and the tests are supposed to be performed on the planchet before the coin is struck. Pretty neat, though.

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    CONECA member
    Tags: None
    • mustbebob
      Lincoln Cent Variety Expert
      • Jul 2008
      • 12758
      #2
      It is neat and it is damage. Rockwell test dots are much smaller, and they don't do them on the edge of a coin either.
      Bob Piazza
      Former Lincoln Cent Attributer Coppercoins.com

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        • willbrooks
          Die & Design Expert, LCF Glossary Author

          • Jan 2012
          • 9477
          #3
          These are essentially impossible to conclusively identify.
          All opinions expressed are not necessarily shared by willbrooks or his affiliates. Taking them may result in serious side effects. Results may vary. Offer not valid in New Jersey.

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