Coin Characteristic Quiz#2

Discussion in 'US Coins Forum' started by Insider, Jun 17, 2020.

  1. Insider

    Insider Talent on loan from...

    Put your thinking cap on but don't think too hard...

    Describe what you see on the edge of this Lincoln cent to someone who cannot see it.. Then tell what could cause this effect and what did you see on the edge to come to that conclusion.

    IMG_3668.JPG
     
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  3. medoraman

    medoraman Supporter! Supporter

    What I see is an unusual concave edge. Normal striking in a collar would not allow this, as the collar would fill normally under pressure. Short of being a fake, I am not aware of what could cause this.

    Is this what you were looking for @Insider ?
     
  4. Insider

    Insider Talent on loan from...

    YES! Good eye. great description too:

    medoraman, posted: "...unusual concave edge. Normal striking in a collar would not allow this, as the collar would fill normally under pressure."
     
  5. longshot

    longshot Enthusiast Supporter

    Looks to me like someone took an ice skate sharpening tool to it. :)
     
  6. bradgator2

    bradgator2 Well-Known Member

    So it's shaped like railroad track? Where the center part of the rim is lower than the edge of the rim?
     
  7. Insider

    Insider Talent on loan from...

    The center of the edge is lower (dips down) than the borders = "concave."
     
  8. Randy Abercrombie

    Randy Abercrombie Supporter! Supporter

    It was in a bezel that was too tight for the cent.
     
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  9. expat

    expat Remember you are unique, just like everyone else

    An un-natural concave edge possibly because the rim was abnormally raised and the metal was unable to flow correctly when struck
     
  10. Insider

    Insider Talent on loan from...

    Bezel? How can a coin fit into a bezel that was too small to begin with?
     
  11. Randy Abercrombie

    Randy Abercrombie Supporter! Supporter

    Hey... I am not a physicist.... Obviously!
     
  12. bradgator2

    bradgator2 Well-Known Member

    It seems like everything related to "mechanical" during the minting process would create a bulging/rounded rim... not concave rim.
     
    Last edited: Jun 17, 2020
  13. bradgator2

    bradgator2 Well-Known Member

    Could a high speed polishing job push enough metal out like that?
     
  14. Insider

    Insider Talent on loan from...

    Someone list all the things that can happen to a coin to create this concave edge.
     
  15. Insider

    Insider Talent on loan from...

    Perhaps BUT...

    What would a polished edge look like? Is the edge of this coin original? Is there any evidence of polishing?
     
  16. cpm9ball

    cpm9ball CANNOT RE-MEMBER

    Encased Cent ~ Chris
     
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  17. Danomite

    Danomite What do you say uh-huh

    Dryer, escalator, coin counter, or any other rotating machinery. Of course this should be obvious by looking at the obverse and reverse of the coin. Due to the uniformity of the concave edge I’m guess a lathe. May have been in a lucky penny token at some time. Just a WAG.
     
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  18. TypeCoin971793

    TypeCoin971793 Just a random guy on the internet

    One of those “good luck” holders? Those are struck to contract the hole and permanently fix the cent
     
    -jeffB likes this.
  19. thomas mozzillo

    thomas mozzillo Well-Known Member

    Just a guess but maybe part of the collar was worn or damaged. Sticking around for the correct answer(s).
     
  20. medoraman

    medoraman Supporter! Supporter

    I was thinking he meant a round mount that can be tightened once the coin is put inside. Someone placed the coin in, then overtightened it and it stayed that way for decades. Now, why someone would put a Lincoln Cent in a bezel would be beyond me.....
     
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  21. expat

    expat Remember you are unique, just like everyone else

    either a lathe or the collar was that shape, how many of that anomaly were struck?
     
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