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Planchet error on a 1973 Kennedy Half Dollar

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    jonathanbjonathanb Posts: 3,425 ✭✭✭✭✭

    What are you asking about? I see nothing noteworthy in your pics.

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    LanceNewmanOCCLanceNewmanOCC Posts: 19,999 ✭✭✭✭✭

    wow. those are some BIG images.

    i'll shrink em a bit.



    <--- look what's behind the mask! - cool link 1/NO ~ 2/NNP ~ 3/NNC ~ 4/CF ~ 5/PG ~ 6/Cert ~ 7/NGC 7a/NGC pop~ 8/NGCF ~ 9/HA archives ~ 10/PM ~ 11/NM ~ 12/ANACS cert ~ 13/ANACS pop - report fakes 1/ACEF ~ report fakes/thefts 1/NCIS - Numi-Classes SS ~ Bass ~ Transcribed Docs NNP - clashed coins - error training - V V mm styles -

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    rickoricko Posts: 98,724 ✭✭✭✭✭

    @junior006 ... Welcome aboard. Good pictures. I assume you are questioning the weight, as it appears to be .4g underweight. Have you checked the calibration on your scale? Compare it to other 1973 Kennedy half dollar weights. Cheers, RickO

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    @ricko yes I weight a lot of half dollars they are always 11.3-11.5. the tolerance for weight is a low of 10.9 and change so its almost .5 of a gram lower than the tolerance. looks like you have been here a while I'm very new to this thanks for your help.
    who is this comment above you I've posted two question had he puts the same ending about fakes.

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    CaptHenwayCaptHenway Posts: 31,561 ✭✭✭✭✭
    edited November 25, 2022 8:42AM

    From one of the pictures it appears to have a slightly smaller diameter. Is this correct?

    If so, the coin might have been trimmed down and re-rereeded for some reason.

    Perhaps it was part of a magic trick set where this coin fit inside something else.

    Numismatist. 50 year member ANA. Winner of four ANA Heath Literary Awards; three Wayte and Olga Raymond Literary Awards; Numismatist of the Year Award 2009, and Lifetime Achievement Award 2020. Winner numerous NLG Literary Awards.
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    rickoricko Posts: 98,724 ✭✭✭✭✭

    @junior006... The post directly above mine, was put there to make your pictures smaller and easier to view. Cheers, RickO

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    @CaptHenway yes smaller in diameter its 29mm its also thicker and weighs way less.

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    jonathanbjonathanb Posts: 3,425 ✭✭✭✭✭

    @junior006 said:
    @CaptHenway yes smaller in diameter its 29mm its also thicker and weighs way less.

    It is physically impossible for the US Mint to produce a reeded coin that is smaller than the expected diameter. Yours may have been trimmed down as Capt Henway suggests. However it got to be this way, it didn't happen within the mint.

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    Steven59Steven59 Posts: 8,294 ✭✭✭✭✭

    a bit of a dryer coin?

    "When they can't find anything wrong with you, they create it!"

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    jmlanzafjmlanzaf Posts: 31,969 ✭✭✭✭✭

    @Steven59 said:
    a bit of a dryer coin?

    No. It would not have sharp reeding

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    2windy2fish2windy2fish Posts: 817 ✭✭✭✭✭

    This coin is a bit of a conundrum! the coin is clearly smaller diameter and the reeding looks really well done!

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    daltexdaltex Posts: 3,486 ✭✭✭✭✭
    edited November 26, 2022 10:15PM

    @junior006 said:
    who is this comment above you I've posted two question had he puts the same ending about fakes.

    That's just his signature. It's attached to every post @LanceNewmanOCC makes. Has nothing to do with your coins.

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    @2windy2fish its driving me crazy how do you trim a coin down just looking at it by its self it looks great but when the bank teller gave it to me and i picked it up i took it straight to a scale.

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    DelawareDoonsDelawareDoons Posts: 3,254 ✭✭✭✭✭
    edited November 27, 2022 11:22AM

    Most of the underweight halves from this era were struck on quarter stock, (the metal they punched the planchets out of was for quarters) IIRC. I have a few of these.

    In this case, though, I think it's just altered.

    Professional Numismatist. "It's like God, Family, Country, except Sticker, Plastic, Coin."

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    lilolmelilolme Posts: 2,464 ✭✭✭✭✭

    @junior006 said:
    @2windy2fish its driving me crazy how do you trim a coin down just looking at it by its self it looks great but when the bank >teller gave it to me and i picked it up i took it straight to a scale.

    .
    It is not difficult to trim a coin down. Putting all the reeding on there, I don't know but that appears to be a lot of work.

    Not sure if it was cut down or tapped down or a combination of both.

    A couple things I notice. While it is thicker, it also appears to be more square on the edges. Also a little rough and the reeds appear to go all the way to the edge whereas the other the reeds stop where the edge bevel is (if that makes sense).

    Found a picture of the edge of one also. Then the bottom picture the reeding on the center one appears much sharper than the other two (some wear going on).

    The video at the bottom shows how easy it is to machine a coin.

    FYI - If you ratio the square of the two diameters (29 and nominal 30.6) you have 841 / 936.36 = .898
    It is under weight by 10.4 / 11.34 (nominal) = .917
    So about the same %.


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    https://youtu.be/IXOXPZ0VKFM

    https://youtube.com/watch?v=2YNufnS_kf4 - Mama I'm coming home ...................................................................................................................................................................... RLJ 1958 - 2023

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    LanceNewmanOCCLanceNewmanOCC Posts: 19,999 ✭✭✭✭✭

    @lilolme said:

    thanks for blowing up this image. it shows some shenanigans going on that pretty much clears this up. imo

    <--- look what's behind the mask! - cool link 1/NO ~ 2/NNP ~ 3/NNC ~ 4/CF ~ 5/PG ~ 6/Cert ~ 7/NGC 7a/NGC pop~ 8/NGCF ~ 9/HA archives ~ 10/PM ~ 11/NM ~ 12/ANACS cert ~ 13/ANACS pop - report fakes 1/ACEF ~ report fakes/thefts 1/NCIS - Numi-Classes SS ~ Bass ~ Transcribed Docs NNP - clashed coins - error training - V V mm styles -

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