What is a IMM?

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  • CCC
    • Jul 2025
    #1

    What is a IMM?

    I noticed this on a website. Thanks.
    Tags: None
    • simonm
      Member
      • Sep 2010
      • 6398
      #2
      Inverted mintmark: the 1946-S to be more specific, I believe. The S can be found punched upside down on some 1946 pennies.
      My old coin album.

        Comment

        • jcuve
          Moderator, Die & Variety Expert
          • Apr 2008
          • 15458
          #3
          Yep, IMM: Inverted Mintmark



          Jason Cuvelier

          MadDieClashes.com - ErrorVariety.com
          TrailDies.com - Error-ref.com - Port.Cuvelier.org
          CONECA
          (images © Jason Cuvelier 2008-18)___________________

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