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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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1972 MDO master die doubling

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  • 1972 MDO master die doubling

    For reference, below are comparisons to the two master dies used in 1972. The earlier master die is on the left (no doubling) and the later master die is on the right with noted differences indicated by arrows.

    Differences: in the motto (IGWT) there is doubling on the outside of the letters, near the rim, that appears as strengthened lettering. All of the T tops are more bulbous, with the T in LIBERTY, noticeably thicker. The upper portions of LIBERTY, in particular the B & R, have doubling and a knotted up appearance. The dates are similar with a very small anomaly floating above the tail of the 2 (these are not to be confused with DDOs 009 or 010).

    Being the second master die (on the right) has doubling, coins minted from dies that originate from that master die are misattributed as being either as a specific listed doubled die, or as a new one.

    At least 50% of all 1972 Lincoln cents show this doubling, making them worth nothing beyond their face value of .01˘. Erroneously listed 1972 DDOs on eBay, are often just Lincolns with this MDO, so beware.

    I have these pictures up HERE, as well.

    Jason Cuvelier

    CONECA
    Lead attributer

  • #2
    Whole coin view of the MDO

    Jason Cuvelier

    CONECA
    Lead attributer

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