Why is this edge 2.5 to 3 times as thick?

Discussion in 'Error Coins' started by JCro57, May 18, 2019.

  1. paddyman98

    paddyman98 Let me burst your bubble! Supporter

    When I get home I will show everyone a few from my collection

    Peace :angelic:
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  3. R_rabbit

    R_rabbit Well-Known Member

    Thank you @paddyman98
    I enjoy learning :)
    It’s quite fascinating to me!
    Mernskeeter likes this.
  4. Michael K

    Michael K Well-Known Member

    If the weight is normal, it's not a thick planchet or wrong stock.
    I know the weight was asked for earlier in the thread, but I think that's important.
    Insider likes this.
  5. Insider

    Insider Talent on loan from...

    AMEN! Furthermore, just because the rim has a fin does not indicate the planchet is normal or not. Think about it. What size planchet would have more chance of excess metal squeezing between the die and collar:


    The weight will answer the question.
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  6. JCro57

    JCro57 Making Errors Great Again

    Should know in a couple days.
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  7. Michael K

    Michael K Well-Known Member

    But this is the internet. We must know the answer an hour ago.
  8. thomas mozzillo

    thomas mozzillo Well-Known Member

    Not questioning if it's a finned rim. Just asking if the coin metal is squeezed into the narrow gap between the die neck and collar, how does the reeded edge extend all the way from top to bottom? I would think the metal that was squeezed into the gap wouldn't have any reeding.
    Last edited: May 20, 2019
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  9. Seattlite86

    Seattlite86 Outspoken Member

    Reasonable question, but that’s beyond my knowledge. I’ve never had the pleasure of viewing these pieces up close to see what that gap looks like. Perhaps the collar reeding extends further than where the coin is struck.
  10. R_rabbit

    R_rabbit Well-Known Member

    Imho, I’m wondering if it is possible that it was reeded twice.
    A glitch in the collar before release?
  11. Seattlite86

    Seattlite86 Outspoken Member

    Ummm... what?? o_O Walk me through the minting process and please explain to me what you think “Reeded twice” means.
    Heavymetal likes this.
  12. paddyman98

    paddyman98 Let me burst your bubble! Supporter

    No.. Only once
    I fell asleep last night. I will show pictures of my Finned Rim coins this evening. Sorry :sorry:
  13. Clawcoins

    Clawcoins Well-Known Member

    The collar is hardened steel.
    The planchet, which is slightly smaller, is pushed into the chamber. The Hammer Die smashes it against the Anvil Die and the coin is squished slightly wider of which the edge takes form of the collar which for dimes has a reeded edge.
    The Anvil die then raises the coin out of the chamber, and retracts waiting for the next one. All much faster than the blink of an eye.
    The collar doesn't generally move from it's position.
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  14. Clawcoins

    Clawcoins Well-Known Member

    You're not allowed to sleep. :dead:
  15. Collecting Nut

    Collecting Nut Borderline Hoarder

    Oh Paddy, please don't apologize for sleeping. We all do it from time to time. @paddyman98 :)
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  16. Conder101

    Conder101 Numismatist

    Yes the "thick" one does have a finned rim, but that is NOT why it looks "thick". It would look thick even if it didn't have a finned rim. The key is the edge is fully struck.

    On the top coin in the first picture the edge and rims are fully formed and the reeding goes all the way from one rim to the other. On the lower coin the edge is NOT fully struck up. It only made contact with the collar in the center area of the edge, and you can see how the metal of the edge then bevels from the reeded portion to where the rim is forming (both obv and rev rims). This gives a reeded edge that is only about half as thick as the upper coin. That makes the upper coin appear "thick". With todays high speed presses edges like the lower coin are not unusual but fully formed ones like the upper coin are and we notice the "unusually thick coin".

    The upper coin is what they should be, the lower coin is what most are, to varying degrees.
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  17. paddyman98

    paddyman98 Let me burst your bubble! Supporter

    I agree with what you have stated. After looking at so many coins over the years you can tell the slight differences.

    But here is what I was explaining. 4 coins from my collection with Misaligned Die Strikes which caused the Finned Rim affect.
    I am showing only the edges on the sides that are finned. You can see the slightly thick appearance compared to a normal struck coin of the same denomination -

    Left Dime - 1988 MAD Finned Rim​
    20190521_033735-1.jpg 20190521_033639-1.jpg

    Left Nickel - 1999 MAD Finned Rim​
    20190521_034124-1.jpg 20190521_034216-1.jpg

    Left Cent - 1971 MAD Finned Rim​
    20190521_034555-1.jpg 20190521_034718-1-1.jpg

    Left Cent - 1999 MAD Finned Rim​
    20190521_035028-1.jpg 20190521_035132-1.jpg

    @Collecting Nut
    Last edited: May 21, 2019
  18. JCro57

    JCro57 Making Errors Great Again

    Just got it in the mail. The weight is 2.3 grams
  19. Collecting Nut

    Collecting Nut Borderline Hoarder

    Thank you, great examples.
    paddyman98 likes this.
  20. R_rabbit

    R_rabbit Well-Known Member

    Thank you for sharing @paddyman98 !
    Nice collections of a finned rim!
    paddyman98 likes this.
  21. paddyman98

    paddyman98 Let me burst your bubble! Supporter

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