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CONECA (pronounced: CŌ´NECA) is a national numismatic organization devoted to the education of error and variety coin collectors. CONECA focuses on many error and variety specialties, including doubled dies, Repunched mintmarks, multiple errors, clips, double strikes, off-metals and off-centers—just to name a few. In addition to its website, CONECA publishes an educational journal, The Errorscope, which is printed and mailed to members bimonthly. CONECA offers a lending library, examination, listing and attribution services; it holds annual meetings at major conventions (referred to as Errorama) around the country.

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1970 S Half - What kind of error is this?

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  • #1

    1970 S Half - What kind of error is this?

    I purchased a 1970 S Proof Set and there is a hole in the reverse of the half dollar coin. Can anyone tell me what kind of minting error this is?

    http://netpro.bc.ca/errors/1970flaw.jpg
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  • #2
    It's hard to tell from the photo, but my guess would be that it's some sort of a strike-through error. In other words, the coin was struck through a piece of debris. Such errors are rare on proofs.
    Mike Diamond. Error coin writer and researcher.

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    • #3
      Value in a Proof Error?

      If the error on this coin is a strike through, has it any value? Should the coin be taken out of the proof set and sent in for grading or left sealed in the set?

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      • #4
        It's not a large strike-through, so I doubt it would be worth more than $20 or $30. So you'd be better off leaving it in the set.
        Mike Diamond. Error coin writer and researcher.

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